Nitrous oxide
a. is a more potent greenhouse gas than
carbon monoxide
b. is released in the burning of fossil fuels
c. destroys the ozone
d. is found in synthetic fertilizers
e. is all of the above
E
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Athlete's foot is caused by
A. Aspergillus. B. Ergot. C. Candida. D. Claviceps. E. None of the choices provided.
Your father's mother was a heterozygous carrier of a X-linked trait. If you are a male, what are the chances of you inheriting this X-linked trait by direct descent from your paternal grandmother?
a) 25% b) 0% c) 12.5% d) 33% e) 50%
The expression of which of the following contributes to development of cancer?
A) tumor suppressor genes B) oncogenes C) proto-oncogenes D) apoptosis genes E) the p53 gene
How would you best explain the existence of a mountain range that has abundant conifer trees, ferns, and mosses on the east side, but only sparse shrubby plants on the west side?
A. Differences in solar intensity produce the differing plant communities. B. Adiabatic cooling leads to temperature gradients that produce the differing plant communities. C. Differences in the specific heat of the two sides of the mountain produce the differing plant communities. D. Precipitation differences due to a rain shadow on the west side produce the differing plant communities.