Which of the following components of the electron-transport chain does not act as a proton pump?
(a) NADH dehydrogenase
(b) cytochrome c
(c) cytochrome c reductase
(d) cytochrome c oxidase
(b)
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Which of the following is not a therapeutic benefit of interferon?
A. Prevents or reduces some cold symptoms B. Treats hepatitis C C. Reduces healing time D. Increases white blood cell count E. Slows progress of some cancers
The sea heats and cools
A. more quickly than the land. B. more slowly than the land. C. at the same rate as the land. D. three times a day. E. more quickly than the land and more slowly than the land.
Which of the following is not part of Darwin's mechanism of evolution?
a. overproduction of offspring b. competition among organisms c. acquiring traits because they are needed d. differential reproductive success e. genetic variation among individuals
You conducted an experiment to investigate whether termites demonstrated orientation behavior. You noticed that termites were attracted to black ink after some preliminary observations. You hypothesized that termites were attracted to a chemical in black ink. which of the following setups provide best control to your hypothesis?
A. Black pen line vs. Blue pen line B. Black pen line vs. indentation made by wood stick C. Black pen line vs. blank paper D. Black pen line vs. Black pencil line