How efficient is cellular respiration in extracting the energy stored in the bonds of glucose?
a. 25%
b. 33%
c. 45%
d. 50%
e. 80%
ANSWER: b
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The several hundred species of picture-winged fruit flies of the Hawaiian Islands are genetically very similar, yet they all differ markedly from their ancestral population in Asia. This is probably an example of _____
A. gene flow. B. sexual selection. C. directional selection. D. founder effect. E. disruptive selection.
A mixture of vegetable oil and water will separate into layers because oil is ____ and forms ____
a. hydrophobic; nonpolar associations b. hydrophilic; nonpolar associations c. hydrophilic; polar associations d. hydrophobic; polar associations e. hydrophobic; ionic associations
Concerning species survival, which status is of
greatest concern?
a. threatened b. endemic c. critical d. endangered e. serious
The term that refers to the accumulation of toxins in a food chain is ____
a. biological amplification b. toxin accumulation c. biological magnification d. chemical amplification e. chemical magnification