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Subjects

Science

Reproduction

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.

Expert · Level 2 · 25 questions

Practice questions

01Why is exchange of materials through placenta life supporting for the embryo?

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02Thickening of the uterine lining in the menstrual cycle indicates preparation for what?

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03If the ovum is not fertilised what does menstrual flow result from?

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04Why do emotional and physical changes appear with reproductive maturity during adolescence?

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05What is the most correct functional difference between contraceptive pills and barrier methods?

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06Why is a condom considered better than pills for protection from sexually transmitted diseases?

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07In sterilisation gametes may still be produced yet why is pregnancy prevented?

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08At what level does a copper contraceptive device reduce the chance of pregnancy?

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09Why is safe behaviour scientifically important in the context of sexually transmitted diseases?

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10If sperm reaches ovum but genetic material does not fuse why will zygote not form?

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11Why is repeated cell division necessary for formation of embryo from zygote?

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12How is half chromosome number in gametes related to stability of a species?

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13If gametes did not have half the chromosome number what problem could occur in every generation?

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14Asexual reproduction rapidly increases number yet why can it be less useful in a greatly changing environment?

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15How can cross pollination give long term benefit to a plant population?

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16A flower has an ovary but pollen grains are not from the same species. Why can normal fertilisation fail?

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17If ovary changes into fruit but ovules are not fertilised what may be absent in the fruit?

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18If placental efficiency decreases what problem may first increase in the embryo?

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19If wastes from the embryo do not move to the mother through placenta what effect will occur on the embryo?

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20Why can both extremely accurate copying and highly error prone copying be problematic?

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21If all offspring of an asexual organism are almost similar why can risk increase during a natural disaster?

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22In which situation can variation produced by sexual reproduction prove most useful?

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23Which option best links cause and result in sexual reproduction of plants?

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24Which option gives the correct order of events in human reproduction?

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25What is the deepest scientific conclusion of the Reproduction chapter?

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