The ______ trimester of pregnancy is characterized by growth,formation of major nerve tracts,and formation of new brain cells.
A) first
B) second
C) third
Correct Answer:
Verified
Q7: Which of the following are stages in
Q8: Certain groups of cells move inward from
Q9: The elaboration of a notochord and a
Q10: There is a protective layer between the
Q11: The milk ejection reflex requires the action
Q13: _ is the initial event in development.
A)Fertilization
B)Cleavage
C)Gastrulation
D)Organogensis
Q14: The trophoblast implants into the endometrial lining
Q15: The appearance of the _ in the
Q16: In mammals,the embryonic cells form an inner
Q17: Birth occurs in response to uterine contractions
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