Job _____ involves categorizing jobs into families.

Negative feedback systems in the body tend to maintain

A) homeostasis. B) excessive body weight. C) lipolysis. D) glucostats. E) positive incentives.

If a woman produced two ova in the same month and these are fertilized by different sperm cells, the result is

a. monozygotic twins. b. dizygotic twins. c. homozygous twins. d. a single pregnancy.