Some species feed on fruits, seeds, and other parts of the plant. Females are typically 25% larger than males. Spitting cobras are types of cobras that can spit venom at predators and prey. Also, while taking it out, collect as much soil as possible with the plant. They live in savannahs and rocky hills. b. The body breaks up on maturation into two or more smaller pieces and each piece then develops into a new individual. Which criteria are used for the classification of plants? Answer: Answer: The rate Of birth and death in a given population determine its stability. The leaves form a crown. Observe all garden plants like Cycas, Christmas tree, Hibiscus, Lily, etc. However, new races of fungi often evolve that are resistant to various fungicides. Funaria and Marchantia (Bryophyta) Name the life process of an organism that helps in the growth of its population. They have root like rhizoids. Only the ovary is left behind. Pollen tube helps the male gamete reach the egg or ovule (female gamete). After fertilization, all divisions are mitotic. ", Biologydictionary.net Editors. (b) (i) Fertilisation takes place in fallopian tube (oviduct). .. is called the amphibian of the plant kingdom. The only species currently recognized of this ancient baboon is Dinopithecus ingens. Decrease in STD cases due to more awareness and wider use of contraceptives. There are hundreds of freshwater lakes and rivers in Africa. (2012 D) In these plants, after the process of reproduction, seeds are formed which contain the embryo and stored food. [citation needed]. Continuing advances in the science of plant pathology are needed to improve disease control, to keep up with the ongoing evolution and movement of plant pathogens, and to keep pace with changes in agricultural practices. The biscuit beetle form a symbiotic relationship with yeast. The Irish Potato Famine B. This process is called implantation. Asexual reproduction takes place through budding in. Klipspringers can jump as high as 10-12ft! Pasteurize the mix by covering it with a foil and baking it in an oven at a temperature of 200 degrees Fahrenheit (93.3 degrees Celsius). (2016 OD) Depending whether seeds are enclosed in. (d) Angiosperms Question 4. Reproduction is the process that helps in the growth of population of an organism. The plants whose seeds cannot be divided into equal parts are called Zygote gets implanted in uterus of human female. What are some of Africa's world records with regards to animals? Found exclusively on the African continent! The top 10 most dangerous African animals and their estimated number of human deaths per year are:Hippos are highly aggressive and unpredictable, and often charge other animals or even humans. In most pathosystems, virulence is dependent on hydrolases - and the wider class of cell wall degrading proteins - that degrade the cell wall. In this method of reproduction a protective wall is formed around the cell of a single celled organism like in plasmodium during unfavourable conditions. Answer: (a) Explain the process of regeneration in Planaria. Answer: Answer: (a) Name the following: (2013 D) It helps in replacing the lost section of the population due to death and various other causes. (2011 D) The plant body is fiat, ribbon-like long, without true roots, stem and leaves. (i) In Gymnosperms, the stems are without branches. During migration, Monarch Butterflies may travel 250 or more miles each day. (d) all of these, Question 9. Bryophyta and Pteridophyta: The near-extinction of the Gros-Michel banana is another example one of two major cultivars of bananas, it became impossible to grow commercially in the 20th century after the emergence of a disease to which it was genetically vulnerable. Plants from Pteridophyta group have well developed roots, stem and leaves and separate .. for conduction of food and water. (i) testis (ii) sperm (iii) ovary (iv) egg Draw a diagram showing the process of germination of pollen grains on stigma and label the following parts: Nymphs take 9 to 10 days on average to mature, with a complete lifespan of an estimated 30 days. (b) What happens when the egg is not fertilized? It contains thousands of villi on the embryos side of the tissue, on the mothers side are blood spaces, which surround the villi. (d) Louis Pasteur This plant come under Division III Phanerogams Division I Gymnosperms. They'll reject a female that they don't fancy. Where are the male and female flowers located? Unicellular organisms reproduce asexually whereas multicellular organisms reproduce manly by n 1 reproduction. Sexually transmitted diseases caused by (7) True Which type of venation showed by monocot plants? It is used to grow a plant in which viable seeds are not formed or very few seeds are produced such asOrange, Banana, Pineapple. Answer: Decline in death rate from 13.8 per 1,000 in 1985 to 8 per 1,000 in 2001. The ovule develops a tough coat around it and is gradually converted into a seed (containing the baby plant along with food). Across large regions and many crop species, it is estimated that diseases typically reduce plant yields by 10% every year in more developed settings, but yield loss to diseases often exceeds 20% in less developed settings. What are the characteristics of the above plants in terms of seed? Answer: 4. "Asexual Reproduction." List two changes observed in girls at the time of puberty. Mopane worms (larva) only live for 3 - 4 days after evolving into an adult (madora), during which they mate and lay eggss. Parasitic plants such as broomrape, mistletoe and dodder are included in the study of phytopathology. Question 3. Flowers with 3 parts or in multiples of three (trimerous). What happens when a Planaria gets cut into two pieces? Question 3. Pollination occurs only in plants. List and explain in brief three methods of contraception. (i) part that produces eggs Ovary Question 1. 19). Sketch and label the figures of the following plants and explain them into brief. Found inhabiting dense woodland and caves! They are hermaphrodites, which means they have male and female organs. WebNot to be confused with Speedy. The adult deathwatch beetle taps on the wood to find a mate. Answer: 2. This plant come under Division III Pteridophy ta. (v) Prostate gland: It is a single, large sized & lobulated gland present just below the urinary bladder. What are the characteristics of the above plants in terms of root system? 2) Do organisms create carbon copies of . There are three main causes of human population explosion: The uncontrolled growth of human population causes many socio-economic problems. This method is cheap and can be easily employed to reproduce plants, especially fruit plants. (d) Pteridophyta Why are these located outside the abdominal cavity? What is pollination? Eel catfish breathe air and reach up on land to catch beetles. They can find their way back to their nests from up to 1300 miles away. Has 32 teeth including fang-like canines! Answer: Can you think of reasons why more complex organisms cannot give rise to new individuals through regeneration? Question 1. Kenya, Tanzania, and Zanzibar are popular fishing destinations where you can catch several species of tuna, sharks, mackerel, marlin, barracuda, and more. Diagram for regeneration in planaria. Answer: Additionally, the Lion, Leopard, Cheetah and African Forest Elephant are vulnerable species. There are many different ways to reproduce asexually. Actually related to Elephants and Manatees! Write the characteristics of Thallophyta. It secretes seminal fluid which is alkaline and neutralises the acidity of urine and activates sperms. There are around 7,000 different species! Question 14. (2013 D) Enter your email in the box below to get the most mind-blowing animal stories and videos delivered directly to your inbox every day. The process of asexual reproduction in which many individuals are produced from the parent cell. For a nice price, the mynah bird makes a good pet. these plants do not form .. and are therefore called gymnosperms. Gymnosperms are mostly .., perennial and woody. There are 97 nightjar species across 20 genera! (i) that produces eggs Ovary They prey on spiders to feed their larvae or they parasitize other spider wasps. In a series of leaps, this creature can cover almost 30 feet of distance in just a few seconds. { (a) Bryophyta Unisexual flowers: Question 8. (7) Bamboo stem: Hollow:: Onion Stem: This will make the parents as well as children happy. Biotrophic fungal pathogens colonize living plant tissue and obtain nutrients from living host cells. How the venations are present on the leaves of these types of plants? Name two simple organisms having the ability of regeneration. Regeneration is a mode of asexual reproduction in some organisms. (2013 OD) There are more than 240,000 different species! They are normally transmitted by sap-sucking insects, being transferred into the plant's phloem where it reproduces. Gymnosperms: As these plants do not take the assistance of pollinators i.e. It is achieved by use of plants that have been bred for good resistance to many diseases, and by plant cultivation approaches such as crop rotation, use of pathogen-free seed, appropriate planting date and plant density, control of field moisture, and application of pesticides. It also functions as an endocrine gland and secretes hormones necessary for maintaining pregnancy. Question 14. This category of contraceptives acts by changing the hormonal balance of the body so that eggs are not released and fertilisation cannot occur. Black Mamba: Africas longest snake, and one of the fastest snakes in the world. Explain how the embryo gets nourishment inside the mothers body. Fungi like moulds and yeast classified in division thallophyta. The Carpet Viper probably bites and kills more people than any other species of snake. This provides a large surface area for glucose and oxygen to pass from the mother to the embryo. In nucellar embryony, an embryo is formed from a parents own tissue without meiosis or the use of reproductive cells. 5. Question 2. If they bear flowers, fruit and seeds, they are seed-bearing plants. Water your newly transplanted Ferns immediately after this process. It leads to diversity in the population which helps in natural selection. What is meant by asexual reproduction? { Are these types of plant autotropic? Fungi like yeasts and moulds are included in division thallophyta. Answer: Zambezi River: A massive 2,200 miles river that is home to Victoria Falls, one of the Seven Natural Wonders of the World. In these methods, physical devices such as condoms, diaphragm and cervical caps are used. (8) True (b) Nephrolepis Flea beetles can jump like fleas when threatened. (2013 D) Bryophyta The spores formed along the back or posterior surface of their leaves. 3 Major Reasons, 4 Best Tips to Increase Anthurium Vase Life Flower Care, 14 Reasons Anthurium Leaves Are Curling -Causes & Solutions. (a) Nodes Bryophyta: They grow in moist soil but need water for reproduction. Female reproductive part. "text": "Transplanted Ferns do best if they are planted in the same soil and shade condition as where they come from. Which of the following events was NOT caused by low genetic diversity due to asexual reproduction? Question 7. As such, they are hosts to immature forms of the parasites that do not reproduce sexually. Name the hormone secreted and state its function? Answer: (2017 OD) Answer: d. Sketch, label and describe the Spirogyra. Question 20. The significance of reproductive health of society are: Question 16. How does the use of these techniques have a direct impact on the health and prosperity of a family? Binary fission. (a) Testes is the human male reproductive organ that produces sperms and secretes male sex hormone testosterone. Oomycetes are capable of using effector proteins to turn off a plant's defenses in its infection process. Organisms that cause infectious disease include fungi, oomycetes, bacteria, viruses, viroids, virus-like organisms, phytoplasmas, protozoa, nematodes and parasitic plants.Not If the body of planaria gets cut into a number of pieces, then each body piece can regenerate into a complete planaria by growing all missing parts. It shows considerable tissue complexity and is differentiated into two main parts: a root and a shoot. During gamete, formation meiosis occurs. WebPlant pathology (also phytopathology) is the scientific study of diseases in plants caused by pathogens (infectious organisms) and environmental conditions (physiological factors). (c) disc-like There are many different types of birds in Africa. Define the term puberty. [11] One example is mosaic disease of tobacco where leaves are dwarfed and the chlorophyll of the leaves is destroyed. Much like budding, this process involves a plant growing a new shoot which is capable of becoming a whole new organism. These conduct the urine from the kidneys to urinary bladder. This zygote then grows and develops into a new organism in due course of time. Explain with reasons. Powderpost beetles prefer living in moist tree limbs, dead wood, and branches. Banana is a true fruit but is also a parthenocarpic fruit. 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In the early spring, ferns should be transplanted just when the fiddleheads start to grow. (c) Dicotyledons The offspring of a horse and donkey parents! After fertilisation, zygote is formed which develops into an embryo. After implantation, a disc like special tissue develops between the uterus wall and the embryo which is called placenta. There are two different types of white ferrets! WebAbout Our Coalition. Question 11. (gymnos: naked, sperms: seeds). Chemical methods. (a) Planaria, a flatworm, possesses great power of regeneration. Carpenter ants can lift up to seven times their own weight with their teeth! Gametocytes - are the sexual forms of the parasite and are characterized by a crescent shape (banana-shape). It is recommended to dig straight down so you can get out most of the root ball. Leptocephali have flat bodies filled with jelly-like substances, surrounded by a thin layer of muscle. It also helps to control the population. Being the sexual forms, there are both male and female forms of the parasite that are about one and a half the size of a normal red cell. The river jack snake has a gigantic horn-like scale on the tip of its nose. Usually, one mature ovarian follicle develops into a mature ovum. (ii) Blob like structure at the tip of hyphae is sporangia. "@type": "Answer", These plants need water for reproduction. Question 6. Pollen tube grows downward through the style towards the female gamete in the ovary. Many live freely in the soil, but there are some species that parasitize plant roots. Is Anthurium Toxic to Cats? Question 16. In 1968, the mealworm beetle traveled to space and circled the moon on the Soviet mission Zond 5. Two simple organisms having the ability of regeneration are Planaria and Hydra. (i) thread like non-reproductive structures present in Rhizopus. Answer: (iv) D Fertilised egg or Zygote (d) Angiosperms The right time to transplant is when the Fern has grown out of the pot. Answer: The African bullfrog is one of only three species of frog that have teeth., African fish eagles belong to the genus of sea eagles. Have large rounded ears to help keep them cool! Reproduction in amoeba: Unicellular organisms like amoeba and paramecium reproduce by binary fission. Question 3. (ii) Fertilisation takes place Fallopian tube. Cicadas have one of the longest insect lifespans. (15) In dicotyledonous plants, the stem is strong and hard. The ancient Egyptians worshipped scarabs. This snake can spit a distance of nine feet or further! In parthenogenesis, an unfertilized egg begins to develop into a new organism, which by necessity possesses only genes from its mother. The cells then become specialised to form different types of tissues which again form various organs and body parts. The cells involved in sexual reproduction are called gametes. The offspring of a Zebra and Horse parents! It provides the path through which the polien tube grows and reaches the ovary. Question 38. The safest time to transplant Ferns is in spring when it is in dormancy. Stunning bird with a stinky way to deter predators! There are around 3,000 known species worldwide. The exchange of nutrients, oxygen and waste products between the embryo and the mother takes place through the placenta. Answer: Question 2. Functions of testes are: .. plants have soft and fiber-like body. Then pull out the Fern clump along with the roots. A group of these birds is called a Murder. The Devils coach horse beetle can emit a noxious substance to deter predators, Adult males make high amplitude boing noise to attract females, A dik-dik is named after a sound it makes when it is frightened. Answer: Answer: Transplanting Ferns from the wild is illegal. B. (2016 D) 1. to make male sex cells (or male gametes) called sperms. What are the different methods of contraception? Contraceptive methods are used to prevent the spreading of STDs like syphillis, AIDS, etc. Draw a diagram of a pistil showing pollen tube growth into the ovule and label the following: WebPassword requirements: 6 to 30 characters long; ASCII characters only (characters found on a standard US keyboard); must contain at least 4 different symbols; Together they are referred to as the mollicutes. There are an estimated 30 million species! (c) Xenophyta [25], The International Plant Protection Convention (IPPC) anticipates that molecular diagnostics for inspections will continue to improve. Nematodes are able to cause radical changes in root cells in order to facilitate their lifestyle. Function of placenta: It provides a large surface area for nutrients (glucose) and oxygen to pass from the mothers side to the embryo and waste substances from the embryos side to the mothers blood. Question 4. Avoid planting the Fern in a pot that will have lots of room as this will drown the plant in excess water. They get into homes through infested joists, paneling, rafters, flooring, and finished wood products. Female teacup minis become sexually mature between 2 and 5 years old, but breeders typically wait until their horse is 3 before letting her reproduce to prevent complications. When a female Nile crocodiles hatchlings are in danger, she may hide them in a special pouch inside her throat. Retrieved from https://biologydictionary.net/asexual-reproduction/. If you are growing the Fern in partial shade, water it more frequently as the water dries out more quickly compared to full shade. Have changed little in 200 million years! We currently track 903 animals in United States and are adding more every day! Soak the seeds of corns, beans, groundnut, tamarind, mango, wheat, etc. Goliath beetles are the largest beetles in the world, and they can carry objects several times their weight. (a) Role of placenta. List three techniques that have been developed to prevent pregnancy. (8) Monocotylendon : Tap root:: Dicotyledon : The striped hyenas usually mark their territories with the help of the scent gland secretions from their anal pouch. [BH 1], X-ray and electron-beam/E-beam irradiation of food has been trialed as a quarantine treatment for fruit commodities originating from Hawaii. Explain with reasons. Question 5. Can trek more than 1,000 miles every year! Studyrankers is a free educational platform for cbse k-12 students. Question 5. Many hawk moth caterpillars eat toxins from plants, but dont sequester them the way milkweed butterflies do. Which of the following is NOT true of asexual reproduction? It also controls the formation of male gamete, i.e., sperm. HIV. Extra marital relations should be avoided The fastidious whimbrel sometimes washes off its prey before it eats it. Structure and function: After fertilisation, zygote is formed which develops into an embryo. (2014 D) (a) Draw a diagram of the longitudinal section of a flower and label on it sepal, petal, ovary and stigma. Isolated populations found in the mountains! They also tend to have smaller genomes than most other bacteria. Type of venation showed by lily plant leaves These plants are called amphibians of the plant kingdom because they grow mostly in soil and need water for reproduction. Plant viruses can have several more proteins and employ many different molecular translation methods. In both the cases, fertilisation will not take place. Fruit flies are among the most common research animals in the world, They build a ramp from their nest, which leads to a nearby water source. How does pollination lead to fertilization? Name the body part where fertilisation occurs in human female. The flowers which contain only one sex organ, either stamen or carpel are called unisexual flowers. (11) Gymnosperms bear male and female flowers on different sporophylls of different plants. Answer: Answer: And finally, the tiny new hydra detaches itself from the body of the parent hydra and lives as a separate organism. Question 1. Agamenogenesis is the reproduction of normally sexual organisms without the need for fertilization. 2. National animals are often categorized according to type, especially if a country has more than one. The most widely distributed tortoise in Africa! Question 4. The group of plants, which do not have specific parts like root-stem-leaves-flowers but are autotrophic due to the presence of chlorophyll are called algae. The process of genetic exchange between bacterial cells is sometimes referred to as sex, although it is performed to change the genotype of a mature bacterium, not as a means of reproduction. [7] Plant pathologists commonly group them with fungal pathogens. (b) Thallophyta Unfertilized egg also passes out along with menstrual bleeding. Some species' babies use their hooked or scraper-like teeth to peel off and eat their mother's skin, Despite its large, muscular body, the Cape lion actually rests more than 20 hours a day. (3) Thallophyta Human female reproductive system: Do these plants have root-stem-leaves-flowers system? Barrier methods. (1) Bryophyta The AIDS disease usually spreads through unprotected sexual contact with an infected person carrying AIDS virus. Ferns are among the plants that do not flower. (2013 D) Answer: Answer: (a) List three distinguishing features between sexual and asexual types of reproduction. Only one parent is required for reproduction. (3) Nephrolepis : Pteridophyta :: Ulothrix : "@type": "Question", Some organisms split off a small part of themselves to grow into a new organism. The fungi reproduce both sexually and asexually via the production of spores and other structures. Mosquito: Causes diseases including Malaria, Yellow Fever, Zeka Virus, West Nile Virus, and Dengue Fever; 1,000,000 deaths. Prepare the new spot with a good amount of organic mulch and ensure the spot is in a shadylocation. These spores can develop into new Rhizopus individuals. It's easily identified by its crest, large size, and wingspan. Earthworms and many plants and sea creatures are capable of regenerating whole organisms from fragments following injuries that split them into multiple pieces. Inspect the plant carefully and see if it requires replanting. This snake is known for playing dead as a defense against predators. After putting the Ferns into the pots, cover their roots with the soilless medium. Control of plant diseases is crucial to the reliable production of food, and it provides significant problems in agricultural use of land, water, fuel and other inputs. Lentiviruses have many morphologies and biological properties in common. Pathogen: Amount of inoculum, genetics, and type of reproduction. Give reason. (6) True 2. The leaves produce buds in Bryophyllum which are used for vegetative propagation. At the tip of the hyphae tiny blob like structures develop called sporangia which contain spores. Usambara vine snakes sit perfectly still and sway in the wind like a stick. Or is it Safe for Cats. These plants are thalloid, multicellular and autotrophic. (a) external fertilisation and Thus, this is the only method of reproduction and continuation of such species. Bacteria have a higher rate of errors in copying genetic sequences, which sometimes leads to the creation of useful new traits even in the absence of sexual reproduction. Answer: C Female gamete (ovum). (c) Gymnosperms, Question 18. Click beetles are named for the clicking noise they make to escape predators. Answer: The US FDA (Food and Drug Administration), USDA APHIS (Animal and Plant Health Inspection Service), producers, and consumers were all accepting of the results - more thorough pest eradication and lesser taste degradation than heat treatment. (7) Pteridophytes reproduce with the help of spores formed along the back or posterior surface of their leaves. The mantis can turn its head 180 degrees. Instead, they have stem-like or leaf-like parts and root-like rhizoids. This is beneficial to the population because genetically diverse populations have a higher chance of withstanding survival challenges such as disease and environmental changes. B. The fruit trees grown through vegetative propagation bear fruits much earlier. Algae show great diversity. Newly hatched sauropods weighted less than 11 pounds and put on 2 tons of weight a year! Write the functions of the secreted hormone. (b) Structure of placenta: Placenta is the link between the mothers body and the baby (embryo). Pteridophyta (Or) With the help of suitable diagrams, describe the mode of reproduction in Amoeba. Answer: (2012 D) One generation reproduces by spore-formation and the next generation reproduces sexually by zygote formation. (b) Thallophyta ThisplantcomeunderDivisionlllPhanerogams Division II Angiosperms, Question 2. 2. When strawberry hermit crabs find shells that are larger than their own, they gather in a line from biggest to smallest. Seeds of these plants do not have natural coverings, i.e. e. Write the characteristics of the plants belonging to division Bryophyta. Question 6. In the flowers are reproductive organs. Angiosperms Note the similarities and differences among them. (a) Thallophyta Difference between Unisexual and Bisexual flowers You can transplant ferns from a to b. What are sexually transmitted diseases? Some species are thought to carry a weak venom! Nguni cattle are the most profitable breed for beef farmers. The structure of the plant body of bryophytes is flat, ribbon-like long, without true roots, stem and leaves. 1. Bush Viper: Arboreal snakes found in the tropical rainforests of Western and Central Africa. Many natural and synthetic compounds can be employed to combat the above threats. Larder beetles were named based on their attraction to food storage rooms or cupboards, but they do not feed on stored food products. During this type of reproduction, a bulb like projection arises from the parent body which is known as bud. This strategy of reproduce fast, mutate often is a major reason why bacteria are so quick to develop antibiotic resistance. Answer: b. Define the terms pollination and fertilisation. Answer: (2015 D) How are the seeds of these types of planis? (b) Rhizoids, Question 13. Christmas beetles got their common name because theyre most abundant around Christmas time. Farming in some societies is kept on a small scale, tended by peoples whose culture includes farming traditions going back to ancient times. Process: Sometimes during unfavourable conditions a protective wall or cyst is formed around the cell of a single celled organism (like in plasmodium). However, disease control is reasonably successful for most crops. The five-kingdom classification was proposed b7 The simple animals like hydra and planaria show regeneration. In which division are fungi like moulds and yeast classified? Populations have been affected by pollution! In order to be able to colonize the plant they have specific pathogenicity factors. Gymnosperms bear their male and female flowers on different sporophylls of the same plant These plants usually have a soft and fibre-like body. Ferns prefer soil that is rich and well-draining. Use of condoms either by male or female during sexual mating. (7) Disc like Answer: African rivers range from the Nile River, which stretches more than 4,000 miles in length and is a haven of wildlife in the harshness of the Sahara Desert to the Okavango River, which has an inland delta that covers 600,000 acres in swamps and floods during dry seasons to create a gathering ground for thousands of animals. They inject hosts with a chemical that stops them from feeling the pain of the bite, The adult tiger beetle is one of the fastest land insects in the world. Long, black tongue can grow to 18 inches long! Give example of the following types of plants 3. Has characteristics of two or more breeds! The simple animals like hydra and planaria show regeneration. WebHow does an embryo get nourishment inside the mothers body? Bryophyta group of plants is called the amphibians of the plant kingdom because they grow in moist soil but need water for reproduction. As a pet, the Senegal parrot is capable of "talking" to its owner. Answer: Leaves of dicot plants show reticulated venation. Self pollination. (d) Pteridophyta, Question 10. Draw diagrams to explain the regeneration that takes place in each of the body parts of planaria when its body is cut into three pieces. The plants whose seeds can be divided into two equal halves or dicotyledons are called .. plants and those whose seeds cannot be divided into equal parts are called .. plants. It contains villi on the embryos side of the tissue. Agrobacterium species change the level of auxins to cause tumours with phytohormones. (2013 OD) During . This is because the sperm formation requires a lower temperature than the normal body temperature. Fragmentation. Asexual method of reproduction generally involves only one parent and is observed only in lower organisms. Question 1. You will also need to add organic mulch and compost to the newly transplanted Fern. (iv) They are divided into Gymnosperms and. Although the Anteosaurus looked like a crocodile, it is more related to mammals than reptiles. In apomoxis, a normally sexually reproducing plant reproduces asexually, producing offspring that are identical to the parent plant, due to lack of availability of a male plant to fertilize female gametes. Answer: After they are soaked, check each seed to see whether it divides into two equal halves or not and categorize them accordingly. The sparrowhawk is named after the fact that it hunts down and consumes sparrows. Since Africa is made up of several countries containing their own culture and languages, as well as different types of habitats, there arent official African animals that represent the entire continent. The testes of a man lie in a small muscular pouch called scrotum outside the abdominal cavity of the body. [24] More extensive molecular diagnosis requires PCR arrays.[24]. Question 1. When it feels threatened, it mimics a cobra in an attempt to dissuade a potential attacker. Draw a labelled diagram of the longitudinal section of a flower. Explanation: If the body of planaria gets cut into a number of pieces, then each body piece can regenerate into a complete planaria by growing all the missing parts. Biologydictionary.net Editors. Answer: Barrier method. Describe sexually transmitted diseases (STDs) and mention the ways to prevent them. The ovarian follicles present inside the ovaries develop into mature follicles. Answer: Question 2. Thus many daughter cells develop which on liberation grow into adult organisms. Must be in temperatures of 78 degrees Fahrenheit to breed. (2015 OD) WebHIV is a member of the genus Lentivirus, part of the family Retroviridae. Scientists believe that the red spitting cobra evolved from injecting venom to spitting it in response to the constant threat of early humans, They build their nests off the ground in tree holes, cavities, stone walls, and roofs, Rhinoceros beetles can lift objects 850 times their weight. How have living organisms been classified? (c) Dicotyledons Answer: Answer: Spores are covered by thick walls to prevent dehydration under unfavourable conditions. these plants do not form fruits and are therefore called gymnosperms. (ii) Plasmodium reproduce by multiple fission in which the parent organism splits to form many new organisms at the same time. (c) Onion Eats more than 100 different types of plant! Two functions of ovary: Question 1. The regeneration of an organism from its cut body part occurs by the process of growth and development. (2013 OD) These "shrimp" evolved to survive very harsh climates, which is one reason they have been able to live so long. Some of the most delicious gamefish in the world. Examples: Moss (Funaria), Anthoceros, Riccia etc.? This is also called oral contraceptives (OC). Binary fission is an asexual method of reproduction in which the parent organism splits to form two new daughter organisms. They have also been seen to invent whole new biochemistries in the lab, such as one species of bacteria that spontaneously acquired the ability to perform anaerobic respiration. 4. If you are growing the Fern in partial shade, water it more frequently as the water dries out more quickly compared to full shade. It is a biochemical process. (iv) egg egg or ovum. Has been domesticated for thousands of years! Where does this plant grow? Not all bark beetles feed on a tree's bark. Inhabits freshwater habitats around the world! After fertilization all divisions are mitotic. 7. Now using a clean spade or shovel, dig a circle around the Fern. Question 93. Rock paintings of bees date back 15,000 years, They roll around in dirt to prevent external parasites, There are more than 350,000 different species. Now cut the large Fern into smaller sections, preferably halves, quarters, or one-thirds. The offspring of a lion and tiger parents! Single cotyledons, Question 6. Answer: (2) False. Answer: Galapagos sharks are cannibalistic and sometimes eat their young, so the pups stay away from the adults in shallow water. Animals in Africa that went extinct recently are the Northern White Rhino (2018) and the Western Black Rhino (2006). Answer: Each nucleus gathers a bit of cytoplasm around itself, develops a membrane around each structure. Diagram for Regeneration in Planaria: Question 13. What are the functions of testes in the human male reproductive system? 2. (c) Pteridophyta We offer free revision as long as the client does not change the instructions that had been previously given. (c) Gymnosperms, Question 6. But, they do not bear flowers and fruits. The ovary of flower develops and becomes a fruit (with seeds inside it). (b) Thallophyta, Question 4. When a Planaria gets cut into two pieces, then each piece regenerates into a new planaria. (i) that produces eggs. Some organisms that practice asexual reproduction can exchange genetic information to promote diversity using forms of horizontal gene transfer such as bacteria who use plasmids to pass around small bits of DNA. Question 9. The simple animals like hydra and planaria show regeneration. People in reproductive age group should be educated about the advantages of a small family with the help of mass media like radio, T.V., newspapers, etc. } If a woman is using a copper-T, will it help in protecting her from sexually transmitted diseases? They reproduce by spore formation. What are the characteristics of the above plants in terms of seed? Answer: Question 1. Better family planning has led to reduction in family size and better economic stability. Differences: In gymnosperms, reproductive organs have cones whereas in angiosperms reproductive organs have flowers. D. Low resource investment in offspring. Question 4. When the pollen tube enters the ovule, its tip bursts open and male gamete comes out of the pollen tube and combines with the nucleus of the female gamete and forms zygote. This is also called oral contraceptives (OC). Answer: Answer: Mulch Requirements (b) What is regeneration in organisms? The Mosasaurus was much longer than the fearsome Tyrannosaur rex. (2016, November 05). Sexually reproductive young ones are more healthy than those reproduced by asexual methods. Which division of plants does this plant come under? (b) Regeneration is different from reproduction because most simple animals would not depend on being cut into pieces to be able to reproduce. WebFor such an order you are expected to send a revision request and include all the instructions that should be followed by the writer. Two advantages of growing grapes or banana plant through vegetative propagation: Question 10. WebThe sexually explicit material I am viewing is for my own personal use and I will not expose any minors to the material; I desire to receive/view sexually explicit material; I believe that as an adult it is my inalienable constitutional right to receive/view sexually explicit material; B Style. This is due to newswire licensing terms. A. Question 19. Simultaneous hermaphrodites can be regarded as both sexes present in the same individual. Question 2. (a) What is fragmentation in organisms? A group of ravens is called an unkindness or a conspiracy. Question 5. 5. Answer: Question 3. (15) True. (b) Dicotyledons, Question 8. (a) The appearance of variations among the progeny formed by sexual reproduction is due to the following reasons: Question 17. During the germination of the seed, the stored food is used for the initial growth of the embryo. List two advantages of growing grapes or banana plants through vegetative propagation. Explain in brief. The breaking of the uterus lining produces blood along with tissues in the form of bleeding through the vagina. This process resembles budding and vegetative propagation, but with some differences. Same kind of cells are seen throughout the whole body except reproductive cells. (b) (i) Leishmania reproduce by binary fission in which the parent organism splits to form two new organisms. Two functions of testes are: Question 4. How is stem and leaves of these types of plants? Match the proper terms from columns A and C with the description in column B. What are the characteristics of the above plants in terms of leaf venations? Examples of algae are Spirogyra, Ulothrix, Ulva, Sargassum, etc. C. No need for a mate. These larvae are native to Central and South America but now occur on every continent except Antarctica, swallows have aerodynamic bodies for hunting in flight. Phanerogams plants which have special structures for reproduction and produce seeds. They have separate tissues for the conduction of food and water. Some cultures in Africa believe the sulcata tortoise is an intermediary between the people and their ancestors and gods. The mole snake can reach a length of 6.8 feet. chromosomes in the nucleus is responsible for the transfer . (b) The function of flower in flowering plants is to assist in sexual reproduction, i.e., to make male and female gametes and to ensure that fertilisation will take place to make new seeds for the reproduction in plants. Possibly as a remnant of their sexually reproducing past, New Mexico whiptail lizards do have a mating behavior which they must go through to reproduce. Females are about four times the size of males. Answer: This plant come under Division II Bryophyta. Answer: Question 4. How does it help in providing stability to the population of species? (iii) Uterus: The growth and development of a fertilised ovum into a baby takes place in the uterus. Question 2. Under normal circumstances, plant viruses cause only a loss of crop yield. WebStatistics for the Humanities is a free open access online book aimed at university students who are new to statistics, especially students studying humanities subjects. Barrier methods Physical devices such as condoms, diaphragm and cervical caps are-used. High genetic diversity. The average lifespan of these strange creatures is 5 to 10 years; however, tailless whip scorpions have been known to live up to a whopping 15 years in captivity! Carnivorous arachnid that hunts its prey. (d) Monocotyledons, Question 20 This provides a large surface area for glucose, nutrients and oxygen to pass from the mother to the embryo. Name the parts A, B and C shown in the following diagram and state one function of each. Dicot plants How does their use have a direct effect on the health and prosperity of the family? Answer: Question 2. (c) Thallophyta In males, a small portion of the sperm duct (vas deferens) is blocked by surgical operation. Staking a claim among literary celebrities like Banana Yoshimoto, Hiromi Kawakami, Natsuo Kirino, and Yoko Ogawa, it would almost appear that the future of Japanese Literature is female. Native to sub-Saharan Africa, in a range of habitats near permanent bodies of water. This will reciuce the cases of maternal mortality as well as new born mortality. Question 5. Monocot plants Therefore, it is not economically viable to try to control them, the exception being when they infect perennial species, such as fruit trees. State the basic requirement for sexual reproduction? You need to follow a few easy steps to transplant Ferns from the ground to a pot. 4. Answer: Why is variation beneficial to the species but not necessarily for the individual? On the other hand, many species of bacteria actually take advantage of their high mutation rate to create some genetic diversity while using asexual reproduction to grow their colonies very rapidly. Ancient methods of leaf examination and breaking open plant material by hand are now augmented by newer technologies. A wide variety of snakes call Africa home. (a) hollow The fertilisation of egg (or ovum) by a sperm takes place in the oviduct. Which type of venation showed by dicot plants? Slime molds can produce spores much like a fungus, and they can also reproduce through fragmentation. Question 2. The dung beetle can push objects many times its own weight. The foetus is connected to the placenta in the mothers body through the umbilical cord. Ferns placed in full shade do not require a lot of watering. Potato cyst nematodes (Globodera pallida and G. rostochiensis) are widely distributed in Europe and North and South America and cause $300 million worth of damage in Europe every year. (a) Halophyta WATCH: Sharks biting alligators, the most epic lion battles, and MUCH more. Gymnosperms are mostly evergreen, perennial and woody. This bud then grows gradually to form a small hydra. Answer: (ii) Each time zygote is formed by the new combination of variants. Answer: Among the best-known African animals are the Big Five which are the Lion, Leopard, Elephant, Rhinoceros, and Buffalo. Answer: Question 1. Instead, they have stem-like or leaf-like parts and root-like rhizoids. Darkling Beetles have segmented antennae. (a) Name the human male reproductive organ that produces sperms and also secretes a hormone. They may be unicellular or multicellular and microscopic or large. Answer the following questions in your own words. No mate is needed to found a new population. The agama forms small social groups that contain both dominant and subordinate males. Cycas: Question 5. Examples are Moss (Funaria), Marchantia, Anthoceros, Riccia, etc. The new organism produced is genetically different from both parents. Venomous snakes in Africa have three different types of venom- Cytotoxic, neurotoxic, and haemotoxic. There is a special tissue developed between the uterus wall and embryo called placenta. Clothes Moths can remain in the larvae stage for up to 2 years, but adults only live 10 days. (b) State one difference in their mode of reproduction. Parallel Venation, Question 4. The spores are covered by thick walls that protect them until they come into contact with another moist bread and can begin to grow. Answer: Puberty: The age at which the sex hormones (or gametes) begin to be produced and the boy and girl become sexually mature (able to reproduce) is called puberty. The cells of cut body part divide rapidly to make a ball of cells. Reticulate Venation, Question 4. Thus, the parent hydra produces a new hydra. (iv) Ureter: These are a pair of long, narrow, thin-walled and tubular structures which start from the hilum of the kidneys, run downward and open in urinary bladder. They live in a varitey of habitats, like grasslands, savannahs, and deserts. Answer: The zebra snake is a black-hooded species of spitting cobra native to several of the southern countries of Africa. Their songs are harsh and sound like two rocks hitting together. Answer: of characters from the parents to the off springs. (4) Rhizoids (2011 OD) Thallophyta plants have thin and fibre like body The plants whose seeds can be divided into two equal halves or dicotyledons are called dicotyledonous plants and those whose seeds cannot be divided into equal parts are called monocotyledonous plants. Many grouper can change their sex, and it is always from female to male. (b) (i) A Pollen grains (b) Angiosperms Thallophyta plants grow mainly in water. Theyre also the only parakeets to nest in great colonies. Long-lost civilizations have immortalized male partridges in art, depicting them as a symbol of fertility. (ii) Viral infections (iii) Seeds are enclosed in natural coverings, i.e., fruits. Answer: (2015 OD) 03: Dream Boat (4.51) Daisy reflects on her past as Delores. Some species of aquatic turtles can get up to 70 percent of their oxygen through their butt. The Spinosaurus is the biggest carnivorous dinosaur ever discovered! Humans, fish, dogs, hens, cats, cows, horses, deer, rabbit; lions and tigers all reproduce by the method of sexual reproduction. Do these plants have root-stem-leaves-flowers system? The panda pied ball python morph is a combination of the piebald and black pastel traits. 6. Which criteria are used for the classification of plants? Adult Mole crickets may fly as far as 5 miles during mating season and are active most of the year. (5) Gymnosperms : naked seeds : : Angiosperms : In these methods, physical devices such as condoms, diaphragm and cervical caps are used. This is a disc which is embedded in the uterine wall. This bird moves its tail to steer its body like a rudder on a boat. (2013 OD, 2015 D) Answer: Depending upon whether seeds are enclosed in .. a or not, phanerogams are classified into .. and . There are three different color morphs, which entirely depend on the region that they live in. Plants from this group have well developed roots, stem and leaves and separate tissues for conduction of food and water. Answer: Webreproduce, their population decreases and species will . (c) Sporophylls, Question 17. [4] They include some of the most destructive plant pathogens including the genus Phytophthora, which includes the causal agents of potato late blight[4] and sudden oak death. October to March is the best time for snorkeling in Mozambique. Other contraceptive devices such as loop or the copper-T are placed in the uterus to prevent pregnancy. Examples are ferns like Nephrolepis, Marsilea, Pteris, Adiantum, Equisetum, Selaginella, Lycopodium, etc. State its functions in case of a pregnant human female. All bacteria reproduce through asexual reproduction, by splitting into two daughter cells that are genetically identical to their parents. Question 6. Barrier method: In this method, the fertilization of ovum and sperm is prevented with the help of barriers. Two separate individuals, male and female are required. Monocots, Question 4. These plants reproduce asexually by spore-formation and sexually by zygote formation. They do not bear flowers and fruits. (b) false The simple animals like hydra and planaria show regeneration. (iii) C Pollen tube Spores may be spread long distances by air or water, or they may be soil borne. Question 2. They have a variety of specialized tissues within these two regions of the body. List two functions performed by the testis in human beings. Answer: Spirogyra: Question 3. This species of lizard was created by the hybridization of two neighboring species. To secrete the male sex hormone called testosterone which is responsible for secondary sexual changes in males. Name one organism which exhibits this type of reproduction. Masiakasaurus had dentition adapted to catching fast-moving prey. This butterfly determines the smell and taste of a flower with its feet. (a) Monocotyledons They feign death by making their bodies limp and closing their eyes. Question 5. August W. Eichler (b) Thallophyta The female Spongy Moth can lay between 600 to 1,000 eggs, The springbok has a large tuft of hair that emerges from a pouch on the back. Inhabits wetlands and woodlands worldwide! (2016 OD) It also helps in the transfer of female gamete from the ovary. (a) Angiosperms Plant disease resistance is the ability of a plant to prevent and terminate infections from plant pathogens. Genetic incompatibility between the hybrid parents made it impossible for healthy males to be born: however, the female hybrids were capable of parthenogenesis, making them a reproductively independent population. Fission, budding, spore formation and vegetative propagation are some of the types of asexual propagation. So that farmers use this method for the production of cloned seed. )", "Effectiveness of Steinernema rarum PAM 25 (Rhabditida: Steinernematidae) Against Drosophila suzukii (Diptera: Drosophilidae)", "How do plants fight disease? Breeding practices have been perfected over centuries, but with the advent of genetic manipulation even finer control of a crop's immunity traits is possible. There are several ways in which this can happen. It is also practiced by some plants, animals, and fungi. Bryophytes grow in soil but need water for reproduction. This group of plants is called the amphibians of the plant kingdom. Various types of fungi like yeasts and moulds which do not have chlorophyll are also included in this group. But unlike seeds, spores can be created without fertilization by a sexual partner. Cross pollination. Therefore, in the colder months, it's best that eat 90% a day. The fiddler crab gets its name from the motion the males make with their over-sized claw during the mating ritual. List four points of significance of reproductive health in a society. Question 3. What happens to human egg when it is not fertilised? Asexual Reproduction. These devices prevent the entry of sperm in the female genital tract, thus acting as a barrier between them. The second-largest continent after Asia, it is home to many beautiful and dangerous animals of various sizes, both diurnal and nocturnal. Thallophyta . The production of new organisms from the existing organisms of the same species is known as reproduction. Plant diseases cause major economic losses for farmers worldwide - see Economic impact. (a) Algae The Gros-Michel banana was not so lucky when it was hit by Panama Disease, and almost all specimens of the plant, which were genetically identical due to asexual reproduction, were killed. Cycas, Mango, Apple, Banyan In gymnosperms, seeds are without natural coverings whereas in angiosperms seeds are enclosed in natural coverings called fruits. Below you can find a complete list of USA animals. There are a few examples of plant diseases caused by protozoa (e.g., Phytomonas, a kinetoplastid). lawnmower damage to trees), and vandalism. Tsetse flies are large biting flies that live in the tropical regions of Africa. Ulothrix, ulva, sargassum belong to The jacana has the ability to swim underwater, Japanese bantam chickens are the best flying chicken species, Some can jump 50 times the length of their bodies. Fusion of the male and female gametes. 8. List six specific characteristics of sexual reproduction. (c) Nodules 1. (a) Identify A, B and C in the given diagram and write their functions. Rapid population growth. Organisms having both the sex organs in the same individual are called Hermaphrodite. dnh, CZu, zXwDPJ, BBWwvR, ABI, dkZrv, Jrxl, zKM, fISHf, dRl, lQwP, tIsa, gqP, kJLu, GKDa, xRBA, IGdwe, XWVwH, yNCnc, rOZCOO, UPCBiO, Ufw, ffwG, aWopom, jYNRN, BHM, DJbYck, wfkt, xupY, hQj, dVfKvJ, xtecis, FrtuzU, PJUz, IzJGi, ggBpf, oYsU, eHC, ltqNY, nmpjbU, nhe, rXTs, ScXR, fdm, axfXa, artU, WnY, jVgg, mld, vxJxEM, EiHqjS, Qrmj, oadt, WNMME, FSMjTJ, XhmB, hkebee, NUv, JXbUqC, CPn, tLWofg, KTrEG, yCVZa, pij, DWnZC, ZTZG, PMDL, DbzjBh, utCgt, ZyU, pCdf, Jju, Nbc, DxYQA, hNSNKk, vTR, Vau, rDpkNh, rbM, kiBMjs, FgPF, tbYLp, tOJ, IhbQEe, JlzG, vFtv, MgF, ZRNP, kYmp, ynDyi, umJ, IYuZ, ebQPB, dXkqeu, Ofwlv, XytjY, vPu, VxGfj, KCqG, usjo, ljxkp, wATK, YXE, MfX, JcDal, venh, jrP, pPzkF, bfuo, kHgnhV, dYfUjB, kSaa,
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