A) centre of rotation of embryo
B) axis of cleavage
C) grey crescent
D) dorsal lip of blastopore
Correct Answer: B
Solution :
The points of sperm entry during fertilization forms axis of cleavage because sperm entry marks the anterior side of future embryo. Therefore, the antry of sperm is established by anterior posterior and dorso-ventral axis of embryo.You need to login to perform this action.
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