The human blastocyst
A) gives rise to umbilical blood vessels.
B) contains a fluid-filled central cavity.
C) is the expanded end of the gastrula.
D) has three germ layers.
E) is the fertilized egg.
Correct Answer:
Verified
Q33: A homeotic gene codes for a(n) _
Q34: Which association is mismatched?
A) chorion-gas exchange
B) amnion-blood
Q35: The sac that surrounds the fetus and
Q36: In experiments with the roundworm Caenorhabditis elegans,
Q37: The sex of the fetus can be
Q39: Which statement is true about homeotic genes?
A)
Q40: Which of the following determines the relationship
Q41: Free radicals cause aging because
A) they collect
Q42: Which of these describes how the skin
Q43: When a baby is born, what change(s)
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