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(a) What substances are contained (i) in...

(a) What substances are contained (i) in oral pills, and (ii) in vaginal pills, used as contraceptives ? How do they work ?
(b) How does copper-T prevent pregnancy ?
(c) Name the disease caused by HIV.

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The correct Answer is:
AIDS
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LAKHMIR SINGH & MANJIT KAUR-HOW DO ORGANISMS REPRODUCE -SHORT ANSWER TYPE QUESTIONS
  1. (a) What does various steps involved in the sexual reproduction in pla...

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  2. (a) What type of plants reproduce by sexual reproduction method ? (b...

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  3. (a) What is puberty ? Who attains pyberty at an earlier age in human ...

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  4. (a) What is gestation period ? How much is the gestation period in hum...

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  5. What are the three types of methods used for birrh control (or regulat...

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  6. (a) What is the name of surgical method of birth control in human male...

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  7. (a) Describe the surgical methods of birth control (i) for men, and (i...

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  8. (a) What is meant by contraceptive ? What are the different methods of...

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  9. (a) What are sexually transmitted diseases ? Give two examples of sexu...

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  10. (a) What substances are contained (i) in oral pills, and (ii) in vagin...

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  11. (a) What is the name of surgical method of birth control (or preventin...

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  12. Explain how, offspring and parents of organisms reproducing sexually h...

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  13. In tabacco plant, the male gametes have 24 chromosomes. (i) what is ...

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  14. (a) What would be the ratio of chromosomes number betweeen an egg and ...

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  15. (a) Fertilisation in humans can occur only once in a month. Why ? (b...

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  16. The diagram shows female reproductive system. Name the parts labelled ...

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  17. What is it advantage for the testes to be situated in the scrotal sac ...

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  18. Which structures in human female are equivalent to the following struc...

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  19. People who die from AIDS are not killed by the virus itself. Explain.

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  20. (a) What is the life support system of a fetus ? (b) How long does a...

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