In alcoholic fermentation, the final product is
a. pyruvate
b. ethanol
c. acetaldehyde
d. acetyl CoA
e. lactate
B
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The main reason polar regions are cooler than the equator is that _____
A) there is more ice at the poles B) sunlight strikes the poles at a lower angle C) the poles are farther from the sun D) the polar atmosphere is thinner and contains fewer greenhouse gases E) the poles are permanently tilted away from the sun
The Ug99 strain of wheat stem rust _____
a. has been eradicated worldwide b. has wiped out most of the wheat around the world c. is unable to infect most wheat varieties d. can infect wheat varieties that were previously resistant to other strains e. is only a problem in the United States
A study of echinoderm embryos, such as sea stars, confirms a similar developmental pattern to that of vertebrates. In both, the blastopore becomes the anus. This would be considered
A. convergent evolution. B. analogy. C. homology. D. behavioral data. E. synapomorphy.
All of the following factors contribute to hospital-acquired infections EXCEPT
A) some bacteria metabolize disinfectants. B) gram-negative bacteria are often resistant to disinfectants. C) invasive procedures can provide a portal of entry for bacteria. D) bacteria may be present in commercial products such as mouthwash. E) None of the answers is correct; all of these factors may contribute to hospital-acquired infection.