Ncert Exercises & Solutions

1. Fill in the blanks:

(a) Humans reproduce _____________ (asexually/sexually)

(b) Humans are _____________ (oviparous, viviparous, ovoviviparous)

(d) Male and female gametes are _____________ (diploid/haploid)

(e) Zygote is _____________ (diploid/haploid)

(f) The process of release of ovum from a mature follicle is called _____________

(g) Ovulation is induced by a hormone called _____________

(h) The fusion of male and female gametes is called _____________

(i) Fertilisation takes place in _____________

(j) Zygote divides to form _____________which is implanted in uterus.

(k) The structure which provides vascular connection between foetus and uterus is called _____________

(a) Humans reproduce sexually.

(b) Humans are viviparous.

(d) Male and female gametes are haploid .

(e) Zygote is diploid.

(f) The process of release of the ovum from a mature follicle is called ovulation.

(g) Ovulation is induced by a hormone called the luteinizing hormone.

(h) The fusion of the male and the female gametes is called fertilization.

(i) Fertilization takes place in the fallopian tube.

(j) The zygote divides to form blastocyst, which is fertilization implanted in uterus.

(k) The structure which provides vascular connection between the fetus and uterus is called placenta.