Which of these events occurs first?
A) gastrulation
B) cleavage
C) implantation
D) formation of the placenta
Correct Answer:
Verified
Q27: At about what point in gestation does
Q28: What is gestation?
A)conception
B)fertilization
C)development
D)pregnancy
Q29: Gastrulation _.
A)produces a solid ball of cells
B)changes
Q30: What action might increase the number of
Q31: Which substance stimulates contractions in uterine smooth
Q33: The "grandmother hypothesis" suggests that natural selection
Q34: Which situation is NOT a legal or
Q35: When does the human embryo implant in
Q36: Mesoderm gives rise to the _.
A)heart and
Q37: What process dominates the third trimester of
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