Which of the following is NOT correct?
A) Embryonic cells are totipotent.
B) Differentiation is due to parceling out of genes into various embryonic cells.
C) The contents of the cytoplasm of an egg are not distributed uniformly.
D) If an egg from a frog divides without receiving the gray crescent,it will not become a tadpole.
E) Differentiation is influenced by chemical signals given off by neighboring cells.
Correct Answer:
Verified
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Q36: In experiments with the roundworm Caenorhabditis elegans,
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Q38: The human blastocyst
A) gives rise to umbilical
Q39: Researchers have discovered _ that determine the
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Q42: Which association is incorrect?
A)chorion-gas exchange
B)amnion-blood vessels
C)allantois-waste storage
D)yolk
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Q49: The placenta develops from
A) fetal membranes only.
B)
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