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Yawning is most often a social animal’s way of signaling to the pack that it needs quiet in order to sleep. Without yawning to synchronize sleep patterns in a group of individuals, one or more of them would keep the others awake. Animals that do not sleep do not survive.
Which of the following, if true, would most significantly strengthen the position developed above?
A Before-sleeping yawning occurs more often than after-sleep yawning, and the difference in the frequency of yawning is much greater when an animal is in a group than it's alone.
B The tendency of an animal to associate with a pack, rather than go about alone, is likely to be genetically determined.
C Animals that spend a large percentage of their day sleeping do not yawning any more during each period just before sleep than do animals that spend a small percentage of their day sleeping.
D Even if a trait has survival value for some animals that roam in packs, it needs to be present in all species of animals that roam in packs.
E Yawning is common behavior in beers, which do not live in packs.
2.Mansour: We should both plan to change some of our investments from coal companies to less polluting energy companies. And here’s why. Consumers are increasingly demanding nonpolluting energy, and energy companies are increasingly supplying it.
Therese: I'm not sure we should do what you suggest. As demand for nonpolluting energy increases relative to supply, its price will increase, and then the more polluting energy will cost relatively less. Demand for the cheaper, dirtier energy forms will then increase, as will the stock values of the companies that produce them.
Therese responds to Mansour’s proposal by doing which of the following?
A. Advocating that consumers use less expensive forms of energy
B. Implying that not all uses of coal for energy are necessarily polluting
C. Disagreeing with Mansour’s claim that consumers are increasingly demanding nonpolluting energy
D. Suggesting that leaving their existing energy investments unchanged could be the better course
E. Providing a reason to doubt Mansour’s assumption that supply of nonpolluting energy will increase in line with demand
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发表于 2021-7-8 05:54:57
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