Botulinum antitoxin produced in a horse and given to a human suffering from botulism food poisoning is an example of
A. naturally acquired passive immunity.
B. naturally acquired active immunity.
C. artificially acquired passive immunity.
D. artificially acquired active immunity.
Answer: C
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Exchange of gases and metabolites between the blood and tissues occurs in the
A. arteries. B. arterioles. C. capillaries. D. venules. E. veins.
Which of the following will eventually
produce a mature pollen?
a. megaspore b. microsporangium c. microspore d. female gametophyte e. megasporangium
The primary function of spongy mesophyll is:
a. photosynthesis. b. transpiration. c. to allow diffusion of gases. d. transport of substances. e. transport of water.
A young male baboon leaves the troop that he was born in and joins a small neighboring troop of small baboons. He quickly rises to become a dominant male. From an evolutionary point of view, what important process has occurred?
A) The bottleneck effect B) Natural selection C) Gene flow D) Genetic drift E) Nonrandom mating