At eight weeks, the embryo is clearly recognizable as a human fetus

The enzyme 5-alpha-reductase is essential for the development of the

A) gonads in both sexes. B) Wolffian ducts in males. C) external genitalia in males. D) testes in males.

In regard to smell, research has found that

A) infants cannot discriminate between their amniotic fluid and the fluid of other infants. B) children are better than adults at discriminating between similar odors. C) at 3 or 4 days old, infants prefer the smell of breast milk to that of formula milk, regardless of whether they were breast-fed. D) at 3 or 4 days old, infants prefer the smell of breast milk to that of formula milk only if they were breast-fed.