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August 30, 2014

Homework Help: biology

Posted by Sarah on Tuesday, February 24, 2009 at 9:55pm.

The blastopore is a structure that first becomes evident during

a. the eight-cell stage of the embryo.
b. coelom formation.
c. fertilization.
d. cleavage.
e. gastrulation.

I think that it is (e). But I am kinda thinking that it could be (d) too. PLEASE HELP!

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