Suppose 64% of a remote mountain village can taste phenylthiocarbamide (PTC) and must, therefore, have at least one copy of the dominant PTC taster allele
If this population conforms to Hardy-Weinberg expectations for this gene, what percentage of the population must be heterozygous for this trait? A) 16%
B) 32%
C) 40%
D) 48%
D
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An organism with a cell wall would most likely be unable to take in materials through _____
A) diffusion B) osmosis C) active transport D) phagocytosis E) facilitated diffusion
Which molecule powers the chemical work within cells?
A) NAD+ B) NADPH C) CO2 D) ATP
What encourages flooding by allowing water to run off into streams?
A. Acid rain B. Deforestation C. Desertification D. Bioaccumulation E. Biological magnification
Sieve tubes are different from vessel elements because they ____.
A. do not have nuclei B. are not connected to each other C. are alive at maturity D. conduct minerals E. transport water