What is meant by contraception? What are the different methods of contraception? (b) What is done in the contraception method known as (i) vasectomy, and (ii) tubectomy?
(a) What is meant by contraception? What are the different methods of contraception?
(b) What is done in the contraception method known as (i) vasectomy, and (ii) tubectomy?
(c) If a woman is using copper-T for contraception, will it protect her from sexually transmitted diseases?
(a) The prevention of pregnancy in women (by preventing fertilisation) is called contraception.
There are 3 methods of contraception:
(i) Barrier method
(ii) Chemical method
(iii) Surgical method.
(b) (i) Vasectomy: In males, a small portion of the sperm duct (Vasdeferens) is removed by surgical operation and both the cut ends are ligated properly. This prevents the sperms from coming out.
(ii) Tubectomy: In females, a small portion of the oviducts is removed by surgical operation and the cut ends are ligated. This prevents the ovum from entering into the oviducts.
(c) No.
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What is ovulation? How often does it happen in human females ? (b) Where does fertilisation take place in human females? (c) Explain why, fertilisation is possible if mating takes place during the middle of menstrual cycle.
3 years ago
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What changes are seen in girls at the time of puberty? (b) Name the organs which produce ova (or egg cells) in human females. (c) Draw a labelled diagram of the human female reproductive system.
3 years ago
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What changes are seen in boys at the time of puberty? (b) Name the organs which produce sperms in human males. (c) Draw a labelled diagram of the human male reproductive system.
3 years ago
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Draw a neat diagram of a flower showing its various parts. In this diagram mark stem, receptacle, sepals, petals, stamen and carpel. (b) What name is given to (i) all the petals of a flower, and (ii) all the sepals of a flower?
3 years ago
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What is meant by ‘unisexual flowers’ and ‘bisexual flowers’? Give two examples of each. (b) What is pollination? How does pollination occur?
3 years ago
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