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
How can cross pollination give long term benefit to a plant population?ExpertLevel 25A flower has an ovary but pollen grains are not from the same species. Why can normal fertilisation fail?ExpertLevel 25If ovary changes into fruit but ovules are not fertilised what may be absent in the fruit?ExpertLevel 25If placental efficiency decreases what problem may first increase in the embryo?ExpertLevel 25If wastes from the embryo do not move to the mother through placenta what effect will occur on the embryo?ExpertLevel 25Why can both extremely accurate copying and highly error prone copying be problematic?ExpertLevel 25If all offspring of an asexual organism are almost similar why can risk increase during a natural disaster?ExpertLevel 25In which situation can variation produced by sexual reproduction prove most useful?ExpertLevel 25Which option best links cause and result in sexual reproduction of plants?ExpertLevel 25Which option gives the correct order of events in human reproduction?ExpertLevel 25What is the deepest scientific conclusion of the Reproduction chapter?ExpertLevel 25How does chromosome number remain constant generation after generation in sexual reproduction?ExpertLevel 27Why can a population reproducing only asexually be at higher risk when a sudden disease appears?ExpertLevel 27What is the importance of a protective covering in multiple fission?ExpertLevel 27What would happen if genetic material does not divide before binary fission in Amoeba?ExpertLevel 27Why is regeneration in Planaria considered different from simple wound healing?ExpertLevel 27Why do offspring produced by vegetative propagation show more similar traits?ExpertLevel 27Which method can be most useful for multiplying seedless plants on a large scale?ExpertLevel 27Why is cleanliness very important in tissue culture?ExpertLevel 27How can Rhizopus spores spread over long distances?ExpertLevel 27