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2.Human Reproduction
normal
In eggs which have very thick and resistant membrane e.g., fishes and insects sperm penetrate through a special canal called
A
Vitelline membrane
B
Jelly coat
C
Polar body
D
Micropyle
Solution
(d)Such egg are not directly penetrated by the sperm. Here in such cases the sperm must penetrate through as special canal called micropyle or outgrowth left in the egg membrane the receptor cone.
Standard 12
Biology