A) vitelline membrane
B) chorion
C) zona pellucid
D) corona radiate
Correct Answer: D
Solution :
Ovulated mammalian egg is surrounded b" three layers, ie, egg envelopes. [a] Vitelline membrane is an inner plasma membrane, which is thin, transparent and secreted by ovum itself. [b] Zona pellucida is the middle glycoprotea which is thick, transparent and non-cellular. [c] Corona radiata is the outer cellular thicker coat formed by radially elongarec follicular cells.
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