The amnion,chorion,and placenta form during the preimplantation period.
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Q3: Temperature regulating mechanisms are well developed in
Q4: All of the following occur during the
Q5: Capacitation is a process that
A) weakens the
Q6: The longest period in prenatal development is
Q7: The single cell that is the result
Q9: Fertilization is the
A) penetration of an ovum
Q10: The second meiotic division in oogenesis is
Q11: Recessive genes express themselves even when they
Q12: Trophoblast cells secrete human chorionic gonadotropin,which has
Q13: The ectoderm,mesoderm,and endoderm develop during the first
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