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Subjects

Science

Reproduction

प्रजनन

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.

Practice questions

Why is direct mixing of mother’s and embryo’s blood not necessary in the placenta?Why is copying of genetic material necessary in reproduction?If genetic material is not copied at all what problem will occur in reproduction?Why are many plants produced from cuttings of the same plant highly similar?How is pollination by insects possible in flowers?Why may fertilisation not occur every time even after successful pollination?Why is asexual reproduction useful for rapid increase in number?Why is sexual reproduction considered useful for evolution even though it is slower?Which example correctly matches asexual and sexual reproduction?Why is variation considered important in the chapter Reproduction?Why is variation higher in offspring during sexual reproduction?Why is offspring formed by asexual reproduction considered very similar to the parent?What is the main difference between binary fission and multiple fission?Why is division of the nucleus necessary before binary fission in Amoeba?When can the new offspring separate during budding in Hydra?Why is fragmentation in Spirogyra successful only when each fragment is living and capable?Why is spore formation in Rhizopus useful under suitable conditions?Why cannot regeneration be considered complete reproduction in every organism?Why can vegetative propagation be useful for farmers?Buds formed on the leaf margins of Bryophyllum are an example of what?