Prostate gland secretion helps in the formation of

Formation of primitive streak in the chick embryo is the first sign of

The number of autosomes in human female ovum is

Fertilization of ovum in mammals, takes place in

Which of the following type of reproduction occurs in sponges?

The preparation of sperm, before penetration into ovum, is called

Female gamete develops into a new individual without being fertilized by a male gamete is called

Antifertilizin is present on

The upper pigmented part of egg is concerned with

The post-embryonic growth is