An effector can be
a. muscle.
b. nerve.
c. gland.
d. receptor.
e. both muscle and gland.
Answer: e
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DNA is coiled into a tight spiral and makes up the ____________ that are the genetic material in a cell
a. genes b. amino acids c. enzymes d. nucleus e. chromosomes
Which of the following mechanisms is the most common by which penicillin resistance occurs?
a. prevention of penetration within the microbe b. ejection of the antibiotic by a pump mechanism c. alteration of the drug's target site or receptor d. inactivation of the drug by an enzyme
The portion of the body that ultimately controls the female menstrual cycle is the
A. hypothalamus. B. uterus. C. anterior pituitary. D. ovaries.
In a species such as elephant seals, in which males are significantly larger than females, the most likely mating system is:
a. polyandry. b. promiscuity. c. monogamy. d. It is impossible to predict the mating system with only this information. e. polygyny.