The membranous cover of the ovum at ovulation is:
a. Corona radiata
b. Zona radiata
c. Zona pellucida
d. Chorion
NCERT Class XII
Biology - Main Course Book
Chapter 3. Human Reproduction
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The correct answer is option C : Zona pellucida.
Zona Pellucida is a transparent layer which protects the ovum and while it travels it looks before and after the fertilization of an egg and it is developed in the ovary.
Zona Pellucida is a transparent layer which protects the ovum and while it travels it looks before and after the fertilization of an egg and it is developed in the ovary.
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The correct answer is option C
The zona pellucida called as the egg coat is the layer of glycoprotein that surrounds the plasma membrane of the mammalian egg cell.
This is an important part of the oocyte.
After five days of fertilization, the blastocyst is replaced by zona hatching, during this time the zona pellucida slowly degenerates and gets decomposed and gets replaced by the cells that is present beneath trophoblastic cells.
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