The placenta protects the developing fetus from harmful substances like alcohol or drugs.
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Q25: Which of the following activates the egg?
A)entrance
Q26: What stimulates milk production in mammary alveoli?
A)oxytocin
B)prolactin
C)chorionic
Q27: In this diagram,which of the following numbers
Q28: Referring to the figure of sperm penetration
Q29: What is the main role of human
Q31: Referring to the figure of sperm penetration
Q32: Removing some fluid from directly around a
Q33: What are the two components of the
Q34: The human placenta is formed by the
Q35: Which of the following result from sperm
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