Question

3) Increase in the size of nucleus
Vitellogenesis refers to
1) Formation of yolk
.
2) Formation of vitelline membrane
4) None of these
The Nebenkern is
1) Male pronucleus
2) female pronucleus
3) Mitochondrial spiral sheath in the middle piece of the the sperm
4) Cytoplasmic sheath in the tail of the sperm.​

Answer 1

Explanation:

formation of yolk

mitochondrial spiral sheath in the middle piece of the sperm

hope it helps you dear

Answer 2

Answer:

3 .The Hen's Egg and its Formation

The vitelline membrane is the transparent casing that encloses the yolk of the hen's egg and separates it from the albumen. It consists of two major layers, the inner layer, which is laid down in the ovary, and the outer layer, which is secreted in the oviduct.