1) Prenatal development over the first eight weeks and the period of development from the ninth week to birth are, respectively, called the?
A) The embryonic period of development and the fetal period of development
B) The fetal period of development and the embryonic period of development
C) Gastrulation and differentiation into germ layers
D) The first trimester and the third trimester
2) After ovulation, fimbriae sweep the ovum into the oviduct. The egg is carried along the oviduct by?
A) Movement of oviduct cilia and smooth muscle contraction
B) Morphogenesis and gastrulation
C) Gravity and striated muscle contraction
D) Cleavage and allantois
3) Several hundred million sperm exit the male reproductive system during a single ejaculation. All the following are reasons so few sperm arrive in the oviduct to fertilize the egg except
A) Some sperm go the "wrong way", entering the other oviduct that does not have the egg
B) Some sperm are formed without flagellum (tails) for locomotion
C) The acidic environment of the vagina destroys many sperm
D) Sperm lack mitochondria to supply the necessary energy for the journey
4) Only one sperm penetrates the plasma membrane of the ovum as
A) The egg's plasma membrane repolarizes, preventing other sperm from entering
B) It is the only sperm to complete the journey successfully to meet the egg
C) The egg's plasma membrane depolarizes, preventing other sperm from entering
D) The enzymes of the egg's acrosome destroy all non-penetrating sperm
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