Which of the following best describes the mechanism of DNA replication in which both a parental strand and daughter strand are combined following replication?
A. Dispersive
B. Semi-conservative
C. Conservative
D. All of the answers are correct
B
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Which of the following do yeast produce during fermentation?
A. Glucose. B. Pyruvate. C. Ethanol. D. Lactate. E. NADH.
A number of different genes have been identified as affecting skin color and there are probably more as yet unidentified. Each of these genes likely has several regulatory protein factors affecting their expression, and those proteins are coded for by
yet more genes. Thus there are many genes involved in determining skin color. A reasonable hypothesis about the geographic distribution of these genes is A) different mutations affecting skin color are likely to be present in geographically different populations of humans. B) humans living in areas with less UV radiation are likely to have many more mutations for skin color and therefore have a greater variation in skin color. C) in any given geographic area, natural selection is likely to lead to a wide variation in skin color.
Short hair (L) is dominant to long hair (l). If a short-haired animal of unknown origin is crossed with a long-haired animal and they produce one long-haired and one short-haired offspring, the results would indicate that
The model below predicts that the begging level of full offspring (F) should essentially be zero, whereas hun-gry (H) and starving (S) offspring show intermediate and high levels of begging, respectively
Under what circumstances would we expect full offspring to start begging? a. When the fitness costs of begging are higher. b. When the fitness costs of begging are lower. c. Only when the fitness costs of begging increase in a nonlinear fashion with begging level. d. Under no circumstances; the full (F) individuals are by definition at begging level zero.