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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 may cross pollination decrease in the absence of agents like insects and wind?What is the correct relation between ovulation and fertilisation in human reproduction?If fertilisation occurs but the embryo does not attach to the uterine wall why will further development be difficult?Why do different contraceptive methods have different mechanisms even though their basic aim is the same?Why is it not enough to depend only on treatment for prevention of sexually transmitted diseases?Why is correct information in reproductive health important from a social point of view as well?Which statement clearly shows the deeper difference between reproduction and growth?Why is variation in reproduction linked with long term survival of a species?In which condition can asexual reproduction be very beneficial?What is the basic similarity between sexual reproduction in plants and humans?What is the deepest balanced conclusion of the chapter on reproduction?How can slight variation arise in offspring even when asexual reproduction produces high genetic similarity?If the nucleus in Amoeba divides many times and then cytoplasm divides into many parts which method does this indicate?Why is cytoplasmic division necessary after nuclear division in binary fission?Before separating from Hydra what does the small bud mainly depend on?Why cannot fragmentation be an effective reproductive method in every multicellular organism?Why is formation of a new organism from a small piece of Planaria not merely wound healing?Why is spore formation useful for fungi even in unfavourable conditions?If spores of bread mould fall on a dry place why will new mould not form immediately?Why can a disease spread rapidly in a crop produced by vegetative propagation?