

InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
401. |
What are the artificial propagation methods in plants? |
Answer» Cutting, Layering and Grafting are the artificial propagation methods in plants. |
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402. |
What are the consequences if meiosis do not happen in the body cells of the organism? |
Answer» 1. Each organism has a fixed number of chromosomes. 2. This number has to be maintained in its offspring. 3. Any sudden change in the number of chromosomes will be harmful to the offspring. Assume parent has 10 chromosomes. 4. In the absence of meiosis during sexual reproduction gametes will also have the same number of chromosomes as parent i.e., 10 chromosomes. 5. Union of female and male gametes occur forming zygote during sexual reproduction. The number of chromosomes doubled in zygote will have 10+10 chromosomes. 6. In the next generation, the offspring will have forty chromosomes. If this continues cells in the offsprings will have thousands of chromosomes within few generation. 7. This results in formation of abnormalities in each generation. Hence by way of meiotic division, the chromosome number is maintained constant from generation to generation. |
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403. |
i) Labelled parts of A, B, C, D above drawn Human female reproductive system.ii) In which part fertilization takes place? iii) Which part is in connection with implantation? iv) What is ovulation? |
Answer» i) A: Fallopian tube B: Ovary C: Uterus D: Vagina ii) Fertilization takes place in fallopian tube. iii) Uterus iv) Release of ovum from graffian follicle of ovary is known as ovulation. |
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404. |
Describe the vegetative propagation through the stem with examples. |
Answer» 1. Production of new plants from the vegetative parts such as stem, root, leaves of the existing plant is called vegetative propagation. 2. Aerial weak stems like runners and stolons, when they touch the ground, give off adventitious roots. 3. When the connection with the parent plant is broken, the portion with the newly struck roots develops into an independent plant. 4. Some examples for propagation by stem are from stolons, bulbs, corms and tubers as follows. a) Stolons – Vallisneria, Strawberry b) Bulbs – Alliumcepa or onion c) Corms – Colacasia d) Tuber – Potato |
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405. |
Men produce sperm from the age of about? |
Answer» Men produce sperm from the age of about 13 or 14 years and can go on doing so most their lives. |
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406. |
Describe different artificial vegetative methods to produce large scale production of plants. |
Answer» 1. Different artificial vegetative propagation methods are cutting, layering, grafting and tissue culture methods. 2. Cutting: Some plants grow individually when a piece of parent plant having bud is cut from the existing plant. After burying in the soil the cut parts having buds grow as an individual plant after developing roots. E.g. Rose. 3. Layering: A branch of the plant with at least one node is bent towards the ground and part of it is covered with moist soil. After sometime, new roots develop from the part of the branch hurried in the soil. The branch is then cut off from the parent plant. E.g: Nerium. 4. Grafting: Two plants are joined together in such a way that two stems join and grow as a single plant. This technique is very useful in propagating improved vari¬eties of various flower and fruits. Grafting is used to obtain a plant with desirable character. E.g: Mango, citrus, apple, rose. 5. Tissue culture: In this method, few plant cells or plant tissues are placed in a growth medium with plant hormones in it and it grows into new plants. Thousands of plants can be grown in very short interval of time. |
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407. |
Explain any two natural and two artificial vegetative propagation methods to produce more number of plants in less time period with examples. |
Answer» Natural propagation: i) Leaves – Small plant grow at the edge of the leaves. Ex: Bryophyllum ii) Stems: a) Stolon – Ex: Jasmine, strawberry b) Bulbs – Ex: Onion c) Corns – Ex: Colocasia d) Rhizome – Ex: Ginger e) Tuber – Ex: Potato iii) Root – Ex: Roots of murayya, guava Artificial propagation: Cutting: Some plants can grow individual when a piece of parent plant having bud is cut off from the existing plants. Ex: Rose, Hibiscus. Layering: A branch of the plant with at least one node is bent towards the ground and a part of it is covered with moist soil leaving the tip of the branch exposed above the ground. Ex: Nerium, Jasmine. Grafting: Two plants are joint together in such a way that stems join and grow as a single plant one which is attached to soil is called stock and stem of another plant without roots is called scion. Both stock and scion are tied with a twine thread and cover by a polythene cover. Ex: Mango, citrus, apple, rose. |
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408. |
Why do fish and frog produce a huge number of eggs each year? |
Answer» 1. External fertilisation occurs in fish and frog. 2. The female lays a vast number of eggs in water and male releases some millions of sperms on to them in water. 3. Eggs may be carried to a long-distance by water currents or they may be eaten by predators. 4. So fertilisation is a chance factor and controlled by nature. 5. Fertilisation occurs externally hence it is inevitable to give rise to vast number of eggs by fish and frog. |
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409. |
Fragmentation (breaking up of filaments into smaller pieces ) is the common method of asexual reproduction inA. yeastB. spirogyraC. AmoebaD. Plasmodium |
Answer» Correct Answer - B | |
410. |
Write a short notes on fragmentation. |
Answer» 1. Fragmentation is a reproductive method in multicellular organisms with relatively simple body organisation. 2. Some can grow from a separate piece of parent organism. This can be from any part of the body. 3. This happens only in the simplest such as some flat-worms, moulds, lichens, spirogyra, etc. 4. Fragmentation is a common mode of reproduction in algae, fungi and many land plants. |
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411. |
Which animals reproduce through fragmentation? |
Answer» Fragmentation is a common mode of reproduction in Algae, Fungi and many land plants. |
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412. |
Whether they reproduce by budding or fission or fragmentation, organisms are copies of their parents. Is it true? Why ? |
Answer» 1. Yes, it is true that organisms reproduced by budding or fission or fragmentation are copies of their parents. 2. Because budding or fission or fragments are not the methods of sexual reproduction. 3. No gametes were formed or fused in these methods. 4. Exchange of chromosomes or crossing over do not take place. Hence the offsprings produced are similar to their parents. |
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413. |
Is regeneration can also be known as a type of fragmentation? Do you agree? Why? Why not? |
Answer» 1. Yes. I agree that regeneration could be also called as a type of fragmentation. Because in both cases pieces or parts from the body of the organism can develop into a new individual. 2. Fragmentation and regeneration occur in multicellular animals. 3. Fragmentation occurs in organisms with relatively simple body organisation. 4. Whereas regeneration occurs in organisms with fully differentiated body organisation. |
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414. |
Apparao and Ramulamma are a newly married illiterate couple. They don’t want children for few years. Suggest some birth control methods for them. (OR) Mention any four birth control methods. |
Answer» a) condoms b) diaphragm (Cap) c) pills d) copper – T e) loop |
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415. |
Write down the function of seminal vesicle. |
Answer» Seminal vesicle stores sperms and secretes semen. | |
416. |
The sperms enter into ……….. from seminal vesicles.A) EpididymisB) Seminal duct C) Prostate gland D) Urethra |
Answer» (A) Epididymis |
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