Whales use sound to
a. communicate.
b. locate food.
c. map out their surroundings.
d. communicate and map out their surroundings.
e. do all of these.
Answer: e
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Based upon the comparisons of anoxygenic and oxygenic photosythesis, the entry of oxygen into the atmosphere is most directly attributed to
A) photosystem I. B) the Calvin cycle. C) photoreactivation. D) photosystem II. E) bacteriorhodopsin.
If a pinpoint colony on blood agar after 24 hours of incubation is isolated, and if the colony is oxidase-, urease-, and indole-negative, and also exhibits bipolar staining on Gram stain, then the suspect bioterror agent is most likely:
a. Bacillus anthracis. b. Francisella tularensis. c. Brucella spp. d. Yersinia pestis.
Survival on land for organisms is difficult because of the problem of
A. desiccation. B. pollination. C. syngamy. D. spore germination. E. coevolution.
What disease is associated with Clostridium tetani?
A) Botulism B) Tetanus C) Anthrax D) Leprosy