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 the need of water air and suitable temperature in seed germination be best understood?ExpertLevel 25Why is the presence of testes in the scrotum important for sperm production in humans?ExpertLevel 25If the sperm duct is blocked why will fertilisation not occur even if sperms form in the testes?ExpertLevel 25What is the most correct difference between functions of ovary and uterus?ExpertLevel 25If the oviduct is blocked why can pregnancy be difficult even if the menstrual cycle is normal?ExpertLevel 25Why does pregnancy not continue if the fertilised egg fails to attach in the uterus?ExpertLevel 25Why is exchange of materials through placenta life supporting for the embryo?ExpertLevel 25Thickening of the uterine lining in the menstrual cycle indicates preparation for what?ExpertLevel 25If the ovum is not fertilised what does menstrual flow result from?ExpertLevel 25Why do emotional and physical changes appear with reproductive maturity during adolescence?ExpertLevel 25What is the most correct functional difference between contraceptive pills and barrier methods?ExpertLevel 25Why is a condom considered better than pills for protection from sexually transmitted diseases?ExpertLevel 25In sterilisation gametes may still be produced yet why is pregnancy prevented?ExpertLevel 25At what level does a copper contraceptive device reduce the chance of pregnancy?ExpertLevel 25Why is safe behaviour scientifically important in the context of sexually transmitted diseases?ExpertLevel 25If sperm reaches ovum but genetic material does not fuse why will zygote not form?ExpertLevel 25Why is repeated cell division necessary for formation of embryo from zygote?ExpertLevel 25How is half chromosome number in gametes related to stability of a species?ExpertLevel 25If gametes did not have half the chromosome number what problem could occur in every generation?ExpertLevel 25Asexual reproduction rapidly increases number yet why can it be less useful in a greatly changing environment?ExpertLevel 25