Who am I?

a) I am formed by the fusion of male and female gametes...

b) I am a gamete that has a tail and travel to fuse with female gamete...

c) I am a fully developed embryo inside a mother’s body...

Can animals produce off springs even without formation of zygotes, how? Explain with suitable example.

How can you identify the animal is viviparous or oviparous.

State the reason why most of the terrestrial animals’ fertilisation takes place internally.

Observe the following figures and write the functions of them.