Give reason !
a) Placenta is extremely essential for foetal development .
b ) Blocking of vas deferens prevents pregnancy .
c) Wind acts as a pollinating agent .
d) Use of condoms pervents pregnancy .
e) Blocking of fallopian tubes prevents pregnancy
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a) Placenta is a temporary organ which is extremely essential for foetal development because it helps in nutrition, respiration, excretion, etc., of the foetus through the maternal supply.
b) Sealing or cutting the vas deferens prevents sperm from reaching the urethra. The goal of the vasectomy is for the man to have no sperm in his ejaculate so that his ejaculate cannot cause pregnancy. A vasectomy is one of the most effective methods of birth control.
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