Question

before fertilization egg of mammal is in the stage of​

Answer 1

Answer:

hey mate!

======

Explanation:

=============

Four important events of fertilization in the sea urchin are: 1) the acrosome reaction of the sperm, 2) sperm-egg fusion, 3) the cortical reaction of the egg, and 4) the formation of the fertilization coat.

==================================================\

thanks!!