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
Appearance of secondary sexual characters during adolescence is related to what control?HardLevel 26Before fertilisation which step can contraceptive pills affect to prevent pregnancy?HardLevel 26Why is a condom considered a method with double benefit?HardLevel 26What is the main difference between a copper device and a contraceptive pill?HardLevel 26In sterilisation gamete formation need not stop yet why can pregnancy be prevented?HardLevel 26Why are contraceptive pills alone not enough for protection from sexually transmitted diseases?HardLevel 26If sperm reaches ovum but their nuclei do not fuse which process remains incomplete?HardLevel 26After zygote formation which process is first important for embryo formation?HardLevel 26Why is having half the chromosome number in gametes useful in sexual reproduction?HardLevel 26Asexual reproduction increases number rapidly but what limitation may appear in a changing environment?HardLevel 26When can cross pollination be considered more useful than self pollination for a species?HardLevel 26If the anther is mature but the stigma is not receptive which process will be affected?HardLevel 26In which situation may a flower form a fruit like structure but no seeds?HardLevel 26Failure of placenta in human embryo development will first affect which need?HardLevel 26If the ovum is fertilised but does not attach properly in the uterus why will pregnancy not continue?HardLevel 26If copying of genetic material in reproduction is very accurate what will be both benefit and limitation?HardLevel 26If there are too many copying errors what effect may occur on survival of offspring?HardLevel 26Which example best shows the relation between reproduction and genetic variation?HardLevel 26Which statement best explains the evolutionary importance of asexual and sexual reproduction?HardLevel 26Which option gives the correct order of sexual reproduction in plants?HardLevel 26