When an atom or molecule gains one or more electrons, it is said to be
A. energized.
B. reduced.
C. oxidized.
D. polarized.
Answer: B
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Which of these organisms is NOT iteroparous?
A. humans B. oak trees C. bears D. dogs E. agave plants
The greater fitness seen in species that reproduce sexually can be contributed to what?
a. Sexually reproducing species are typically born into stable environments so have greater fitness. b. Fewer offspring are born, so more care can be given to each offspring. c. Genetic diversity is created through sexual reproduction. d. Sexual reproduction has greater energy requirements. n
An ancient group of linked brain structures form the ______ system, which is involved in making some activities, like eating or sex, seem pleasurable, while others, like pain or hate, seem stressful.
Fill in the blank(s) with the appropriate word(s)
Aerobic respiration is ultimately the reaction of glucose with oxygen to generate carbon dioxide, water, and energy. However, in a cell this process involves the transfer of electrons from glucose to carriers such as NAD+ over a lengthy series of steps. Why don't cells employ the direct reaction of glucose with oxygen to generate energy?
A. The direct reaction of oxygen with glucose does not spontaneously occur. B. The direct transfer of electrons from glucose to oxygen occurs via a combustion reaction that is incompatible with life. C. Oxygen and glucose are localized in different subcellular compartments. D. The direct reaction of oxygen with glucose would be much less efficient.