The neural tube, which forms the brain and spinal cord, begins to develop during which stage?
A) germinal
B) embryonic
C) fetal
D) implantation
Correct Answer:
Verified
Q27: The endodermic layer eventually becomes the
A) respiratory
Q28: The formation of the placenta occurs during
Q29: A naturally occurring termination of a pregnancy
Q30: A general estimate is that _ of
Q31: What percentage of miscarriages occur even before
Q33: The spongy tissue that grows out of
Q34: Which of the following structures connects the
Q35: The umbilical cord contains
A) two veins and
Q36: By _ the eyes begin to form,
Q37: The first reflexes appear during which of
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