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Subjects

Science

Reproduction

In this Class 10 Science topic from the “World of Living” chapter, students explore how organisms produce new individuals and why reproduction is essential for the continuation of life. They compare asexual and sexual reproduction, study reproductive processes in plants and humans, and understand puberty, the human reproductive system, fertilisation, menstruation, and basic reproductive health. The topic also introduces contraception and the role of responsible choices in preventing unwanted pregnancy and sexually transmitted infections.

Hard · Level 3 · 25 questions

Practice questions

01How can slight variation arise in offspring even when asexual reproduction produces high genetic similarity?

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02If the nucleus in Amoeba divides many times and then cytoplasm divides into many parts which method does this indicate?

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03Why is cytoplasmic division necessary after nuclear division in binary fission?

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04Before separating from Hydra what does the small bud mainly depend on?

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05Why cannot fragmentation be an effective reproductive method in every multicellular organism?

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06Why is formation of a new organism from a small piece of Planaria not merely wound healing?

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07Why is spore formation useful for fungi even in unfavourable conditions?

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08If spores of bread mould fall on a dry place why will new mould not form immediately?

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09Why can a disease spread rapidly in a crop produced by vegetative propagation?

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10Why does a farmer use cuttings of a good plant to maintain the same qualities?

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11Why may a potato piece without an eye fail to form a new plant?

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12How is formation of a new plant from Bryophyllum leaf different from seed reproduction?

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13Sexual reproduction needs more energy and time yet why is it useful for a species?

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14If pollen reaches the stigma but is not from the same species why may fertilisation not occur?

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15Why is a pollen tube necessary for fertilisation even after pollination?

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16Why can variation in offspring be lower in self pollination than in cross pollination?

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17If stamens are removed from a flower but pistil remains intact what is still possible in that flower?

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18After fertilisation ovule becomes seed and ovary becomes fruit. Why are seeds found inside the fruit?

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19If a flower has an ovary but its ovules are not healthy what will happen to seed formation?

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20Even after getting water why can seed germination stop if air is unavailable?

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21How is the location of testes outside the body in scrotum related to sperm formation?

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22If testes produce sperms but sperm ducts are blocked why will the chance of fertilisation decrease?

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23Why can the success of sperms decrease if fluid in semen is insufficient?

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24If the oviduct is blocked why can pregnancy be difficult even when ovaries are normal?

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25Fertilisation occurs in the oviduct but why does the embryo attach in the uterus?

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