About ____ weeks after conception,embryo's ovaries or testes,have formed although the embryo's sex is not apparent by ultrasound.
A) two
B) four
C) six
D) eight
Correct Answer:
Verified
Q4: The greatest vulnerability to teratogens occurs in
Q4: Viability of the fetus is reached by
Q8: What is the commonly accepted view of
Q10: Which progression represents the correct sequence of
Q11: In the embryonic stage, _.
A) the blastocyst
Q11: Which sequence represents the stages of prenatal
Q15: Under normal circumstances, a zygote has _
Q16: All the major organs and biological systems
Q20: A developing organism that has become a
Q199: By _ weeks, the fetus can kick,
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