(a) Draw a diagram of the longitudinal section of a flower and label on it sepal, petal, ovary and stigma. They reproduce by .. formation. Answer: Walp. Native to the savannahs of sub-Saharan Africa. Answer: The potting mix you prepare for planting the Fern in a pot should contain equal parts of sand, gardening soil, and peat moss. Conducting tissues for food and water absent. under? Leaves of dicot plants show reticulated venation. How is stem and leaves of these types of plants? Solved the very best collection of How do Organisms Reproduce Class 10 Science Important Questions and Answers Chapter 8 Pdf from the latest NCERT edition books, It will help you in scoring more marks in CBSE Exams. (iii) where zygote is implanted Uterus Answer: Answer: These plants need water for reproduction. You can watch streams from amateur & professional models for absolutely free. Crop rotation may be an effective means to prevent a parasitic population from becoming well-established. These are caused by species of Plasmodiophora and Spongospora, respectively. Why are these located outside the abdominal cavity? They are the largest living turtle and the only sea turtle without a hard shell! Answer: Question 2. 4. Mozambique Spitting Cobra is one of Africa's most dangerous snakes. Learn more about us & read our affiliate disclosure. However, new races of fungi often evolve that are resistant to various fungicides. Males tend to be more brightly colored than females, and females are significantly bigger than males. Gymnosperms bear male and female flowers on different sporophylls of the same plant. They can find their way back to their nests from up to 1300 miles away. Fragmentation is the process of breaking up of the body of a simple multicellular organism into two (or more) pieces on maturing, each of which subsequently grows to form a complete new organism. This strategy would not work well for an organism that invests highly in the survival of individuals, such as multicellular organisms. Question 5. Answer: It is a disc like structure embedded in the uterine wall connected to the embryo. There does seem to be an unnecessary focus on the teenage girls achievements and on how she had set her sights on a military career before she had the mRNA injections. Answer: (2) Fungi like yeasts and moulds are included in division bryophyta. Gymnosperms are mostly evergreen perennial and woody. (i) fertilisation takes place, Various types of fungi like yeasts and moulds are included in the group The Soil should contain peat, compost, and sand. (i) Bacterial infections In these methods, physical devices such as condoms, diaphragm and cervical caps are used. Some organisms can only perform asexual reproduction because their genetics does not allow for the existence of healthy males. Answer: (2011 D, 2014 D) Plant disease resistance is the ability of a plant to prevent and terminate infections from plant pathogens. (b) Fungus (2012 D) themselves? This method is cheap and can be easily employed to reproduce plants, especially fruit plants. Believed to be the inspiration for unicorn myths! Answer: Cycas and Christmas tree are gymnosperms, whereas Hibiscus and lily are angiosperms. Nematodes are small, multicellular, wormlike animals. (b) Name the parts of the human female reproductive system where Answer: Answer: Do these plants have a root-stem-leaves-flowers system? What are the characteristics of the above plants in terms of leaf venations? The simple multicellular animals like hydra and planaria show regeneration. The oral pills contain hormones which stop the ovaries from releasing ovum into fallopian tube. They have a well-developed conducting system. Human Immuno Deficiency Virus Question 4. So testis pro-duces male germ cells (sperms). Answer: Example: The flowers of hibiscus and mustard plants are bisexual flowers. Tarantula hawks are excellent pollinators, especially for milkweed. I am transforming my apartment into an urban jungle and am growing veggies in my indoor and outdoor garden year-round. Answer: This species of lizard was created by the hybridization of two neighboring species. Question 1. They get into homes through infested joists, paneling, rafters, flooring, and finished wood products. Example: The flowers of papaya and watermelon are unisexual flowers. You should only transplant Ferns that are grown on your property or inside your house." (6) Dicotyledon : Reticulate venation : : Monocotyledon: During gamete, formation meiosis occurs. Question 2. Question 3. All of them can be seen in South Africa and are native animals:Rhinos are one of the Big Five African Land AnimalsHenk Bogaard/Shutterstock.com. Thus, these seeds are covered; hence, they are called angiosperms (angios: cover, sperms: seeds). (3) Nephrolepis : Pteridophyta :: Ulothrix : 1. Question 17. With the help of suitable diagrams, describe the mode of reproduction in Amoeba. Not all bark beetles feed on a tree's bark. Contraceptive methods are also used to control human population by checking the unwanted pregnancies during sexual activities. This process resembles budding and vegetative propagation, but with some differences. Function of testosterone hormone is to control the development of male sex organs and male features such as deeper voice, moustaches, body hair, etc. (b) Describe the changes the uterus undergoes: The agama forms small social groups that contain both dominant and subordinate males. (a) What is fragmentation in organisms? Liopleurodon were fast swimmers that lived entirely under water, but they had no gills. Another name for these fuzzy insects is "boogie-woogie aphids" because of their habit of lifting their posteriors and pulsing them in synchronized motions when threatened. In 1968, the mealworm beetle traveled to space and circled the moon on the Soviet mission Zond 5. WebWe care about the privacy of our clients and will never share your personal information with any third parties or persons. Answer: We earn from qualifying purchases. This presents the sperms from coming out. By adopting various methods of contraception: 2. Browse through thousands of open-minded people: naked girls, guys, transsexuals and couples performing live sex shows. The plants whose seeds can be divided into equal parts are called (5) Plants belonging to Thallophyta group are only unicellular. Farming in some societies is kept on a small scale, tended by peoples whose culture includes farming traditions going back to ancient times. Gymnosperms Angiosperms "mainEntity": [ (b) Mention the changes a flower undergoes after fertilisation. Mieko Kawakami's novel Breasts and Eggs is a bold literary statement and another first person, modern, feminist novel from Japan. When human egg is not fertilised then the thick and soft inner lining of uterus is no longer needed and hence it breaks down in the form of vaginal bleeding known as menstruation. (Foreign 2010C) Or Why is banana referred to as a parthenocarpic fruit? Answer: 5. Answer: Most species are relatively vocal, making harsh croaking sounds and squeals. 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. 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. This plant come under Division III Pteridophy ta. Solitary locusts are grey while gregarious locusts are yellow with stripes. Killer clown ball pythons can cost several thousand dollars. In the flowers are tetramerous or pentamerous. The structure of the plant body of bryophytes is flat, ribbon-like long, without true roots, stem and leaves. Axanthic ball pythons lack yellow pigment in their skin! (b) Pteridophyta Give one example of such organism. Answer: (a) Pteridophyta Question 1. How does the use of these techniques have a direct impact on the health and prosperity of a family? If you are growing the Fern in partial shade, water it more frequently as the water dries out more quickly compared to full shade. Answer: [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. List two advantages of growing grapes or banana plants through vegetative propagation. c. In pteridophytes, asexual reproduction occurs by .. formation and sexual reproduction occurs by ..formation. They are called phants or satanics in the pet trade. Modes of sexual reproduction allow for greater variations to be generated which are useful for ensuring the survival of the individuals of species during the struggle for existence. This category of contraceptives acts by changing the hormonal balance of the body so that eggs are not released and fertilisation cannot occur. So a small family is a happy family. Small rodents found in woodlands worldwide! 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. Some huntsman spiders have an interesting way of moving around. At the new location, dig a hole that has a similar depth as the previous. There are many different types of birds in Africa. (b) Structure of placenta: Placenta is the link between the mothers body and the baby (embryo). (i) Organisms have been classified based on the following: (ii) Organisms are also classified at kingdom level and groups and subgroups. 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. Are these types of plant autotropic? (ii) where fusion of egg and sperm takes place. Question 2. Condoms are barriers made of thin rubber that are used to cover penis in males and vagina in females. Define the term puberty. (b) (a) Robert Whittaker, Question 2. The adult deathwatch beetle taps on the wood to find a mate. (9) Depending upon whether seeds are enclosed in a fruit or not, phanerogams are classified into monocots and dicots. Answer: The female pretend they are dead if they do not find the male worthy of mating. What are the functions performed by the testis in human beings? The "Orange Dream" name came from the idea that the morph would make its first breeder a million dollars. Question 1. The right time to transplant is when the Fern has grown out of the pot. The Irish elk had the biggest antlers of any known deer species. Answer: The process of getting back a full organism from its body parts is called regeneration. (2013 OD) Pollination occurs only in plants. (a) Name the respective part of human female reproductive system: Generally boys attain puberty at the age of 13 to 14 years while girls reach puberty at the age of 10 to 12 years. Fragmentation. Specimens may be destroyed or relocated into a greenhouse for treatment or study. Darren is known for his extravagant, eccentric, hot (gymnos: naked, sperms: seeds). (iv) D Fertilised egg or Zygote New organism produced is genetically different from both. Because they have only one cell, bacteria are able to change their genetic material as mature organisms. Answer: Most plant viruses have small, single-stranded RNA genomes. During this reproduction process, first the nucleus divides into two daughter nuclei followed by the division of cytoplasm. Or is it Safe for Cats. Question 7. Thallophyta plants grow mainly in .. . } List two advantages of vegetative reproduction practised in case of an orange plant. Transplanting Ferns from the wild is illegal. (2014 D) Bryophytes have a root-like structure called 4. Can jump over 6 feet straight up from a standstill. Question 20. Question 3. (d) Banyan Around 35 million in the English countryside! 1. Barrier method. 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 process of getting back a full organism from its body parts is called regeneration. These plants bear male and female flowers on different sporophylls of the same plant. Diagram for regeneration in planaria. Which of the following is NOT true of asexual reproduction? Angiosperms (a) Planaria, a flatworm, possesses great power of regeneration. 3. Type of venation showed by lily plant leaves Write the characteristics of Gymnosperms. During germination of the seed, the stored food is used for the initial growth of the embryo. The five-kingdom classification was proposed b7 (14) True (ii) Each time zygote is formed by the new combination of variants. Hydra reproduces by budding which is an asexual type of reproduction. Three techniques to prevent pregnancy are: Use of copper-T is not meant for males. (d) Banyan, Question 11. Can spot a dead animal from thousands of feet away. (2012 D) Rapid reproduction. Your marks play an important role in shaping future thus these NCERT Solutions will become your comprehensive guide in easy learning and evaluating yourself. (b) The process of getting back a full organism from its body parts is called regeneration. Answer: 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. Answer: Now using a clean spade or shovel, dig a circle around the Fern. (a) (i) Thread like non-reproductive structures present in Rhizopus is hyphae. 04: Garden Variety (4.63) Daisy obeys Glenn and gives the Groundskeeper a show. The Eurasian jay has the ability to mimic other sounds. There are about 3,000 documented species! The embryo gets nutrition from the mothers blood with the help of a special tissue called placenta. The flowers of Angiosperms plants bear are their .. organs Flowers develop into .. and seeds are formed within .. . A. Causes primary amoebic meningoencephalitis. 1. Barrier methods. Family planning by using various contraceptives enables a couple to decide on the number of children they want to have and when to have them. (3) True To secrete female hormones estrogen and progesterone. After fertilisation, zygote is formed which develops into an embryo. It is as if the notion of high-achieving young people having reactions to the jabs is a greater tragedy than if someone who is older or less successful also got sick 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. Plant viruses can have several more proteins and employ many different molecular translation methods. Observe all garden plants like Cycas, Christmas tree, Hibiscus, Lily, etc. (ii) Plasmodium reproduce by multiple fission in which the parent organism splits to form many new organisms at the same time. List two functions performed by the testis in human beings. (i) Where the development of egg occurs. This occurs in a few species of all-female animals, and in females of some animal species when there are no males present to fertilize eggs. Examples are ferns like Nephrolepis, Marsilea, Pteris, Adiantum, Equisetum, Selaginella, Lycopodium, etc. The Egyptian cobra is one of the largest cobras in Africa. Barriers are available for both males and females. 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"text": "Transplanting Ferns from the wild is illegal. (c) Gymnosperms, Question 18. 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. (3) Thallophyta Thallophyta The yellow belly gene is co-dominant and doesn't completely override other genes. The process of asexual reproduction in which many individuals are produced from the parent cell. (7) Pteridophytes reproduce with the help of spores formed along the back or posterior surface of their leaves. Their stems are without branches. Such sexual reproduction leads to more variation in the offsprings for their successful living in the changing environmental conditions. List any four modes of spreading AIDS. Fungi like moulds and yeast classified in division thallophyta. (d) Equisetum There are more than 45 species in Australia alone! After implantation, a disc-like special tissue develops between the uterus wall and the embryo called placenta. The fallow deer has more variation in its coat colors than most other deer. Answer: Surgical methods. It shows considerable tissue complexity and is differentiated into two main parts: a root and a shoot. Answer: Keep in mind that Ferns appreciate a moist environment so make sure your newly transplanted Fern does not dry out. Another example is Bunchy top of banana, where the plant is dwarfed, and the upper leaves form a tight rosette. The DNA (Deoxyribo nucleic acid) molecules in the . (2015 OD, 2017 D) (a) After fertilisation, zygote is formed which develops into an embryo. There are more than 50 different species! Larder beetles were named based on their attraction to food storage rooms or cupboards, but they do not feed on stored food products. Exhibitionist & Voyeur 10. (b) Robert Hooke How do these plants reproduce? Question 93. (c) How does the amount of DNA remain constant though each new generation is a combination of DNA copies of two individuals? Take a leaf of a fully grown fern and observe it carefully. How are angiosperms classified into monocot and dicot? The Yellow Cobra belong to one of the most dangerous families in the world. This strategy of reproduce fast, mutate often is a major reason why bacteria are so quick to develop antibiotic resistance. Answer: They are hermaphrodites, which means they have male and female organs. The angelsharks range has contracted by more than 80% in the past century. (a) The appearance of variations among the progeny formed by sexual reproduction is due to the following reasons: Write the importance of such reproduction in nature. In nucellar embryony, an embryo is formed from a parents own tissue without meiosis or the use of reproductive cells. Depending upon whether the seeds are enclosed in fruit or not, plants are classified as gymnosperms (naked-seeds) and angiosperms (seeds covered by fruit), Depending upon the number of cotyledons in seeds, plants are classified into dicotyledons and monocotyledons. The survival of animal reproducing sexually has better chance of survival: State the basic principle involved in each. (iii) C Pollen tube This group of plants, which do not have specific parts like root-stem-leaves-flowers but are autotrophic due to the presence of chlorophyll, is called algae. . The biggest members of the Pelagornithidae family were the largest flying birds known. Five main types of bacterial pathogenicity factors are known: uses of cell walldegrading enzymes, toxins, effector proteins, phytohormones and exopolysaccharides. What are those organisms called which bear both the sex organs in the same individual? These plants bear male and female flowers on different sporophylls of the same plant. Question 5. Found inhabiting dense woodland and caves! The leaves form a crown. 7. To solve this, new methods are needed to detect diseases and pests early, such as novel sensors that detect plant odours and spectroscopy and biophotonics that are able to diagnose plant health and metabolism.[2]. "name": "Can I transplant Ferns from the wild? Significant oomycete plant pathogens include: Some slime molds in Phytomyxea cause important diseases, including club root in cabbage and its relatives and powdery scab in potatoes. (c) What happens when the Egg is not Fertilised? Sophisticated agricultural developments now allow growers to choose from among systematically cross-bred species to ensure the greatest hardiness in their crops, as suited for a particular region's pathological profile. [24] Bertolini et al 2001, Ito et al 2002 and Ragozzino et al 2004 developed PCR methods for multiplexing six or seven plant pathogen molecular products and Persson et al 2005 for multiplexing four with RT-PCR. This zygote then grows and develops into a new organism in due course of time. When a grey parrot named Yosuke got lost, it was reunited with its owner after giving the owner's name and address. Stigma is for receiving the pollen grains from the anther of stamen during pollination. (2012 OD) (d) Angiosperms "@type": "Answer", Answer: .. plants have soft and fiber-like body. (15) In dicotyledonous plants, the stem is strong and hard. (ii) Where fertilisation takes place. How does it occur in plants? Parallel venation. (2013 OD) Decline in death rate from 13.8 per 1,000 in 1985 to 8 per 1,000 in 2001. For example, protection against infection by Agrobacterium tumefaciens, which causes gall diseases in many plants, by dipping cuttings in suspensions of Agrobacterium radiobacter before inserting them in the ground to take root. Question 4. 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. (d) Bryophyta 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. We will guide you on how to place your essay help, proofreading and editing your draft fixing the grammar, spelling, or formatting of your paper easily and cheaply. There are around 5,000 different species! (b) Thallophyta These devices prevent the entry of sperm in the female genital tract, thus acting as a barrier between them. (d) Robert Hooke Answer: Four out of five of the worlds fastest land animals: The fastest is the. carry out fission. Bryophyta and Pteridophyta: Answer: (i) In Gymnosperms, the stems are without branches. This group of plants is called the amphibians of the plant kingdom. This is a disc which is embedded in the uterine wall. "@type": "FAQPage", While primitive in the sense of being the most labor-intensive solution by far, where practical or necessary it is more than adequate. "acceptedAnswer": { When a mature spirogyra filament attains considerable length, it breaks up into smaller fragments or pieces, and each fragment grows into a new filament or individual. Answer: Answer: Multiple fission. Fungal diseases may be controlled through the use of fungicides and other agriculture practices. If you are growing the Fern in partial shade, water it more frequently as the water dries out more quickly compared to full shade. While you divide the roots, ensure that each set of roots has some leaves growing on it. Simultaneous hermaphrodites can be regarded as both sexes present in the same individual. Asexual reproduction: (b) Reason: There is always a possibility of diversity of characters in the offsprings because the offspring is formed as a result of fusion of two gametes produced by two different individuals the male and the female parents. (a) Nodes Answer: Christmas beetles got their common name because theyre most abundant around Christmas time. The exchange of nutrients, oxygen and waste products between the embryo and the mother takes place through placenta. Various types of fungi like yeasts and moulds which do not have chlorophyll are also included in this group. Answer: Farmers pick apomictic seeds in plants which do not reproduce sexually. Gardeners that illegally transplant Ferns from the wild lead to the extinction of certain species. (ii) where fusion of egg and sperm takes place, and Gymnosperms are mostly evergreen, perennial and woody. Web2. Eel catfish breathe air and reach up on land to catch beetles. In this way, embryo gets its nutrition. 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