The sperm penetrates the ovum mainly by:

Receptors for sperm binding in mammals are present on:

What gives rise to an adult individual?

Fertilizin is secreted by which of the following?

Which process leads to the formation of a zygote?

Assertion: Holoblastic cleavage with almost equal-sized blastomeres is a characteristic of placental animals.
Reason: Eggs of most mammals,including humans,are of centrolecithal type.