Compared to a solution of pH 9, a solution of pH 7
A. has no OH- ions.
B. is more basic.
C. has a higher pH.
D. has more H+ ions.
E. All of these choices are correct.
Answer: D
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Segments of polypeptides that are retained following protein splicing are called
A) introns. B) exons. C) inteins. D) exteins. E) cleaved.
Which of the following involves a subjective judgment?
a. A fact b. A theory c. An hypothesis d. An opinion e. A control
Contraction of leg muscles aid in the function of which system?
a. digestive b. cardiovascular c. respiratory d. nervous e. endocrine
On a road trip in the American West, you see a prairie dog town-a colony of related animals. There are hundreds of prairie dogs, but only a subset are scanning for predators at any time. If a predator is spotted, a prairie dog barks to warn the rest of the colony, who dart into their burrows. Prairie dogs have a complex vocabulary of alarm calls, which differ to indicate hawks, coyotes, or humans. What feature of group living is best illustrated by the prairie dog alarm system?
A. reciprocal altruism B. haplodiploidy C. the many-eyes hypothesis D. the geometry of the selfish herd E. optimality theory