The human embryo's first blood cells arise in the
A) developing bone marrow.
B) developing liver.
C) allantois.
D) yolk sac.
Correct Answer:
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Q12: Which of the following statements about the
Q13: Which of the following occurs during the
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Q16: Human testes are positioned in an external
Q17: Another term for gestation is
A)development.
B)pregnancy.
C)fertilization.
D)conception.
Q18: Which of the following options correctly represents
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Q20: Which of the following statements regarding birth
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