The fertilizin chemical is present in

What is involved in the assisted reproductive technology $IVF$?

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.

In sexually reproducing multicellular animals,where does the development begin?

Which of the following is true for cleavage?

The region where the sperm enters the egg is called: