1) In evolutionary theory, natural selection is driven primarily by
A) differential reproductive success.
B) differential survival success.
C) survival of the fittest.
D) All of the above.
E) B and C.
2) Stages of sleep are easily distinguished by
A) changes in respiration.
B) the quality and quantity of dreams.
C) changes in the electrical activity of the brain.
D) changes in consciousness.
E) Both A and B.