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Question : (a) State any two changes seen in boys at the time of puberty. (b) Define fertilisation and implantation. |
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Answer» Solution :(a) (i) Body BECOMES MUSCULAR. (i) Facial and pubic hair. (b) Fertilisation - It is the process of UNION of male and female gamete to form zygote. Implantation - It is the process of attachment of EMBRYO in the uterine wall, with the help of placenta. |
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