Consider a living plant cell in a living leaf that is not wilted. The solute potential (?S) of such a cell ____ than that in
the fluids surrounding the cell.
a. is typically lower
b. varies widely from higher to lower
c. is typically higher
d. is typically about the same as
e. is typically less negative
ANSWER: a
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A friend of yours calls to say that his car would not start this morning. He asks for your help. You say that you think the battery must be dead. If so, then jump-starting the car from a good battery will solve the problem. In doing so, you are _____
A) testing a theory for why the car will not start B) making observations to inspire a theory for why the car will not start C) stating a hypothesis and using that hypothesis to make a testable prediction D) comparing multiple hypotheses for why the car will not start
Refer to Figure 40.12 in your text. If you found a mammal skull that had large, pointed canines and relatively narrow, blade-shaped molars and pre-molars, you could infer that it came from an animal specialized for feeding on:
A. primarily meat. B. primarily tough plant material. C. primarily soft plant material, such as fruit. D. a combination of meat and tough plant material. E. a combination of meat, soft plant material such as fruit, and tough plant material.
Which method of animal cell infection is used by enveloped viruses, but not non-enveloped viruses?
a. receptor-mediated endocytosis b. membrane-channel injection c. fusion d. diffusion
Gram-negative bacteria in the genus ________ prey on other Gram-negative bacteria.
A. Bdellovibrio B. Chlamydia C. Rickettsia D. Mycoplasma E. Caulobacter