When does the heart begin to develop?
A) one week
B) three weeks
C) five weeks
D) seven weeks
E) nine weeks
Correct Answer:
Verified
Q4: During fertilization,several sperm penetrate the corona radiata.
Q6: The adhering follicular cells that surround the
Q8: Once the cortical granules release their enzymes,the
Q11: Which part of the sperm contains the
Q13: Where are the mitochondria located in the
Q15: Describe what occurs during cleavage,growth,morphogenesis,and differentiation.
Q15: Describe the steps in fertilization of an
Q16: Embryonic development begins with
A) fertilization.
B) the first
Q18: Which of the following is involved in
Q46: Development ceases at birth.
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