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In species with direct development, fewer offspring are produced, but a higher proportion survives to adulthood.

A) True
B) False

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The outer cell layer of the blastocyst becomes the , which forms the embryonic portion of the placenta.


A) primitive streak
B) chorion
C) inner cell mass
D) yolk sac
E) embryonic disk

F) B) and E)
G) A) and E)

Correct Answer

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