In a population that is in Hardy-Weinberg equilibrium for two alleles, C and c, for a character determined by complete dominance, 16% of the population show a recessive trait. Assuming C is dominant to c, what percent of individuals show the dominant trait?
a. 36%
b. 48%
c. 84%
d. 60%
e. 96%
Answer: c. 84%
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According to the endosymbiotic theory, why was it adaptive for the larger (host) cell to keep the engulfed cell alive, rather than digesting it as food?
A) The engulfed cell provided the host cell with adenosine triphosphate (ATP). B) The engulfed cell provided the host cell with carbon dioxide. C) The engulfed cell allowed the host cell to metabolize glucose. D) The host cell was able to survive anaerobic conditions with the engulfed cell alive. E) The host cell would have been poisoned if it had digested the engulfed cell.
Which of the following have been an effective immunosuppressant for use in transplantation?
A. Amphotericin B and cephalosporin B. Amphotericin B and cyclosporin A C. Amphotericin B and tacrolimus D. Cephalosporin and tacrolimus E. Cyclosporin A and tacrolimus
Which of these types of islands is predicted to have the lowest number of species?
A. small island near mainland B. large island near mainland C. large island far from mainland D. small island far from mainland E. the island closest to mainland regardless of size
A gene from a bacterium can be inserted into a corn plant, and the corn plant will make the same protein as the bacterium. This kind of gene transfer works because:
A) the bacterium and the corn plant are very closely related from an evolutionary perspective. B) the bacterium and the corn plant use the same process and genetic code for synthesizing proteins. C) the bacterium and the corn plant are able to interbreed and produce fertile offspring. D) the bacterium infects the corn plant's cells and uses its cellular machinery to produce the protein. E) every organism's DNA is identical.