Question

6. The sperms are : (a) Motile (b) Static (c) Both (a) and (b) (d) None of these 7. After fertilisation, the eggs split into two; the two parts into four, four into eight and so on. In this way turns into : (a) An embryo (b) The foetus (c) both (a) and (b) (d) none of thes 3. A pair of testes in the scrotal sac (a) stores sperms (b) produce sperms (c) is used for injecting sperms Uterus in females are for : (a) development of fertilised egg (b) producing egg (c) stores eggs One ovum (egg) cell is released from one of the ovaries approximately every : (a) 20 days (b) 28 days (c) 25 days (d) None of t 1 in the blanks : reproduction does not take place during​

Answer 1

6. (a) Motile

Sperms have a long tail and show flagellar movement.

7. (c) both (a) and (b)

After fertilization, the diploid zygote undergoes cleavage (mitotic division) to form multicellular embryo which develops to form the foetus.

3. (b) produce sperms

Testes are the primary male reproductive organ. They are the site of sperm formation (spermatogenesis).

(a) development of fertilised egg

Uterus is the site of implantation of embryo and provides nutrition and protection to the growing foetus.

b) 28 days

In one menstrual cycle one egg is released from one of the two ovaries. On an average, one complete menstrual cycle lasts for 28 days.