Question for Practice Test: Reading Comprehension - 97 Question _index_: The passage suggests that because Weddell seals are forcibly submerged during laboratory dives, they do which of the following? A. Exhibit the physiological responses that are characteristic of dives in the wild that last less than twenty minutes. B. Exhibit the physiological responses that are characteristic of the longer dives they undertake in the wild. C. Cope with oxygen deprivation less effectively than they do on typical dives in the wild. D. Produce smaller amounts of lactic acid than they do on typical dives in the wild. E. Navigate less effectively than they do on typical dives in the wild. View Solution

Exhibit the physiological responses that are characteristic of dives in the wild that last less than twenty minutes.

Exhibit the physiological responses that are characteristic of the longer dives they undertake in the wild.

Cope with oxygen deprivation less effectively than they do on typical dives in the wild.

Produce smaller amounts of lactic acid than they do on typical dives in the wild.

Navigate less effectively than they do on typical dives in the wild.

Question for Practice Test: Reading Comprehension - 97 Question _index_: Which of the following best summarizes the main point of the passage? A. Recent field studies have indicated that descriptions of the physiological behavior of the Weddell seal during laboratory dives are not applicable to its most typical dives in the wild. B. The Weddell seal has developed a number of unique mechanisms that enable it to remain submerged at depths of up to 500 meters for up to 70 minutes. C. The results of recent field studies have made it necessary for biologists to revise previous perceptions of how the Weddell seal behaves physiologically during its longest dives in the wild. D. Biologists speculate that laboratory studies of the physiological behavior of seals during dives lasting more than twenty minutes would be more accurate if the seals were not forcibly submerged. E. How the Weddell seal responds to oxygen deprivation during its longest dives appears to depend on whether the seal is searching for prey or avoiding predators during such dives. View Solution

Recent field studies have indicated that descriptions of the physiological behavior of the Weddell seal during laboratory dives are not applicable to its most typical dives in the wild.

The Weddell seal has developed a number of unique mechanisms that enable it to remain submerged at depths of up to 500 meters for up to 70 minutes.

The results of recent field studies have made it necessary for biologists to revise previous perceptions of how the Weddell seal behaves physiologically during its longest dives in the wild.

Biologists speculate that laboratory studies of the physiological behavior of seals during dives lasting more than twenty minutes would be more accurate if the seals were not forcibly submerged.

How the Weddell seal responds to oxygen deprivation during its longest dives appears to depend on whether the seal is searching for prey or avoiding predators during such dives.

Question for Practice Test: Reading Comprehension - 97 Question _index_: The passage provides information to support which of the following generalizations? A. Observations of animals’ physiological behavior in the wild are not reliable unless verified by laboratory studies. B. It is generally less difficult to observe the physiological behavior of an animal in the wild than in the laboratory. C. The level of lactic acid in an animal’s blood is likely to be higher when it is searching for prey than when it is evading predators. D. The level of lactic acid in an animal’s blood is likely to be lowest during those periods in which it experiences oxygen deprivation. E. The physiological behavior of animals in a laboratory setting is not always consistent with their physiological behavior in the wild. View Solution

Observations of animals’ physiological behavior in the wild are not reliable unless verified by laboratory studies.

It is generally less difficult to observe the physiological behavior of an animal in the wild than in the laboratory.

The level of lactic acid in an animal’s blood is likely to be higher when it is searching for prey than when it is evading predators.

The level of lactic acid in an animal’s blood is likely to be lowest during those periods in which it experiences oxygen deprivation.

The physiological behavior of animals in a laboratory setting is not always consistent with their physiological behavior in the wild.

Question for Practice Test: Reading Comprehension - 97 Question _index_: The passage suggests that during laboratory dives, the pH of the Weddell seal’s blood is not adversely affected by the production of lactic acid because A. only those organs that are essential to the seal’s ability to navigate underwater revert to an anaerobic mechanism B. the seal typically reverts to an anaerobic metabolism only at the very end of the dive C. organs that revert to an anaerobic metabolism are temporarily isolated from the seal’s bloodstream D. oxygen continues to be supplied to organs that clear lactic acid from the seal’s bloodstream E. the seal remains submerged for only short periods of time View Solution

only those organs that are essential to the seal’s ability to navigate underwater revert to an anaerobic mechanism

the seal typically reverts to an anaerobic metabolism only at the very end of the dive

organs that revert to an anaerobic metabolism are temporarily isolated from the seal’s bloodstream

oxygen continues to be supplied to organs that clear lactic acid from the seal’s bloodstream

the seal remains submerged for only short periods of time

Question for Practice Test: Reading Comprehension - 97 Question _index_: According to the author, which of the following is true of the laboratory studies mentioned in line 1? A. They fail to explain how the seal is able to tolerate the increased production of lactic acid by organs that revert to an anaerobic metabolism during its longest dives in the wild. B. They present an oversimplified account of mechanisms that the Weddell seal relies on during its longest dives in the wild. C. They provide evidence that undermines the view that the Weddell seal relies on an anaerobic metabolism during its most typical dives in the wild. D. They are based on the assumption that Weddell seals rarely spend more than twenty minutes underwater on a typical dive in the wild. E. They provide an accurate account of the physiological behavior of Weddell seals during those dives in the wild in which they are either evading predators or exploring distant routes. View Solution

They fail to explain how the seal is able to tolerate the increased production of lactic acid by organs that revert to an anaerobic metabolism during its longest dives in the wild.

They present an oversimplified account of mechanisms that the Weddell seal relies on during its longest dives in the wild.

They provide evidence that undermines the view that the Weddell seal relies on an anaerobic metabolism during its most typical dives in the wild.

They are based on the assumption that Weddell seals rarely spend more than twenty minutes underwater on a typical dive in the wild.

They provide an accurate account of the physiological behavior of Weddell seals during those dives in the wild in which they are either evading predators or exploring distant routes.

Question for Practice Test: Reading Comprehension - 97 Question _index_: It can be inferred from the passage that by describing the Weddell seal as preparing “for the worst” (line 41), biologists mean that it A. prepares to remain underwater for no longer than twenty minutes B. exhibits physiological behavior similar to that which characterizes dives in which it heads directly for its prey C. exhibits physiological behavior similar to that which characterizes its longest dives in the wild D. begins to exhibit predatory behavior E. clears the lactic acid from its blood before attempting to dive View Solution

prepares to remain underwater for no longer than twenty minutes

exhibits physiological behavior similar to that which characterizes dives in which it heads directly for its prey

exhibits physiological behavior similar to that which characterizes its longest dives in the wild

begins to exhibit predatory behavior

clears the lactic acid from its blood before attempting to dive

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