Question

Blastodisc or germinal disc refers to the protoplasm of egg, this is restricted to small area in
A) Amphibian egg
B) Avian egg
C) Ascidian egg
D) Mammalian egg

Answer 1

Blastodisc or germinal disc refers to the protoplasm of egg, this is restricted to the small area in the avian egg.

so B is correct answer 

I hope it will help you
regards

Answer 2

Answer:

Option 4 is the correct answer.

Explanation:

Mammalian eggs have very less amount of yolk, that's why eggs are oligolecithal & isolecithal or microlecithal & homolecithal. 0.1 mm is the usually size of mammalian eggs.