The reduction in environmental awareness that defines sleep renders animals vulnerable to predation. Although animals can dilute this risk by sleeping in groups, the benefit is greatest for those in the center, farthest from approaching predators. Indeed, mallards (Anas platyrhynchos) switch from sleeping with both eyes closed and both cerebral hemispheres [bihemispheric slow-wave sleep (BSWS)] when safely flanked by other birds to sleeping unihemispherically, with one eye open and the contralateral hemisphere awake, when exposed at the edge of a group. As sleeping at the edge is risky and results in lower quality unihemispheric slow-wave sleep (USWS), birds likely compete to obtain and defend a central position within the group, especially when nesting in colonies. However, in colonial birds, such as penguins, intraspecific aggression from neighbors and disturbance from birds walking through the colony might have a negative impact on sleep. Given the threat from outside and the hustle and bustle within the colony, it is unclear whether nesting in the center of a colony leads to better sleep quantity and quality.
Which choice best describes the overall structure of the passage?
- A. The passage examines the effect of decreased environmental awareness on some animals' predation risk and then describes the strategies those animals use to increase their environmental awareness while sleeping.
- B. The passage distinguishes between bihemispheric slow-wave sleep (BSWS) and unihemispheric slow-wave sleep (USWS) and then explains why USWS is less beneficial than BSWS for animals such as mallards and penguins.
- C. The passage discusses the advantages for some animals of sleeping at the center of a group and then questions whether those advantages extend to colonial birds.
- D. The passage provides an extended description of how mallards typically sleep and then compares sleeping behaviors in mallards to those in penguins.
Correct Answer & Rationale
Correct Answer: C
Choice C accurately captures the passage's structure, which begins by exploring the benefits of group sleeping for certain animals and then raises a critical inquiry regarding the applicability of these benefits to colonial birds. This dual focus on advantages and questioning reflects a balanced examination of the topic. Option A misrepresents the content by suggesting a focus on predation risk and strategies for environmental awareness, which is not the main theme. Option B incorrectly centers on a comparison of sleep types, neglecting the broader discussion of group sleeping benefits. Option D inaccurately emphasizes a detailed comparison of mallards and penguins, rather than the initial exploration of group sleeping advantages.
Choice C accurately captures the passage's structure, which begins by exploring the benefits of group sleeping for certain animals and then raises a critical inquiry regarding the applicability of these benefits to colonial birds. This dual focus on advantages and questioning reflects a balanced examination of the topic. Option A misrepresents the content by suggesting a focus on predation risk and strategies for environmental awareness, which is not the main theme. Option B incorrectly centers on a comparison of sleep types, neglecting the broader discussion of group sleeping benefits. Option D inaccurately emphasizes a detailed comparison of mallards and penguins, rather than the initial exploration of group sleeping advantages.
Other Related Questions
The author of Passage 1 uses the phrase 'That's right' in order to:
- A. acknowledge that a claim may be surprising
- B. confirm that a prediction was accurate
- C. concede that a criticism has merit
- D. emphasize that a debate has been settled
Correct Answer & Rationale
Correct Answer: A
The phrase "That's right" is used to acknowledge a statement or claim, often indicating that it may be unexpected or surprising to the audience. This aligns with option A, as it highlights an awareness of the potential shock value of the claim. Option B is incorrect because confirming a prediction implies certainty and agreement with a prior statement, which is not the intent of the phrase. Option C misinterprets the phrase's meaning; conceding a criticism suggests acceptance of fault, which does not fit the context. Option D also misses the mark, as emphasizing a settled debate would imply finality, whereas "That's right" suggests an ongoing dialogue rather than closure.
The phrase "That's right" is used to acknowledge a statement or claim, often indicating that it may be unexpected or surprising to the audience. This aligns with option A, as it highlights an awareness of the potential shock value of the claim. Option B is incorrect because confirming a prediction implies certainty and agreement with a prior statement, which is not the intent of the phrase. Option C misinterprets the phrase's meaning; conceding a criticism suggests acceptance of fault, which does not fit the context. Option D also misses the mark, as emphasizing a settled debate would imply finality, whereas "That's right" suggests an ongoing dialogue rather than closure.
In context, the statement that the woman is 'draped from brow to ankle in gold and wind-crushed linen' (sentence 10) primarily:
- A. reveals the narrator's assumptions about the woman's income
- B. explains why the woman might be uncomfortable in the cold weather
- C. shows how different the woman's clothing is from the narrator's clothing
- D. emphasizes how out of place the woman seems in the surrounding environment
Correct Answer & Rationale
Correct Answer: D
The description of the woman being "draped from brow to ankle in gold and wind-crushed linen" emphasizes her opulent attire, suggesting she is out of place in her surroundings. This stark contrast highlights her distinctiveness compared to the environment, reinforcing her isolation. Option A misinterprets the focus on income rather than the visual impact of her clothing. Option B incorrectly assumes discomfort from the cold, which is not the primary focus of the imagery. Option C, while noting a difference in clothing, fails to capture the broader context of the woman’s disconnection from her environment, which is central to the statement.
The description of the woman being "draped from brow to ankle in gold and wind-crushed linen" emphasizes her opulent attire, suggesting she is out of place in her surroundings. This stark contrast highlights her distinctiveness compared to the environment, reinforcing her isolation. Option A misinterprets the focus on income rather than the visual impact of her clothing. Option B incorrectly assumes discomfort from the cold, which is not the primary focus of the imagery. Option C, while noting a difference in clothing, fails to capture the broader context of the woman’s disconnection from her environment, which is central to the statement.
The author implies that the social sciences:
- A. are valued for their techniques
- B. can make no contribution to progress
- C. cannot deal with long-term issues
- D. may someday add to the world's knowledge
Correct Answer & Rationale
Correct Answer: D
The social sciences are portrayed as fields that hold potential for future contributions to global knowledge, indicating optimism about their evolving role. Option A suggests that their value lies solely in techniques, which limits their broader impact. Option B dismisses their potential entirely, contradicting the author's implication of future contributions. Option C incorrectly asserts that social sciences cannot address long-term issues, overlooking their capability to analyze historical trends and societal changes. Thus, the emphasis on future contributions aligns best with the text's implications.
The social sciences are portrayed as fields that hold potential for future contributions to global knowledge, indicating optimism about their evolving role. Option A suggests that their value lies solely in techniques, which limits their broader impact. Option B dismisses their potential entirely, contradicting the author's implication of future contributions. Option C incorrectly asserts that social sciences cannot address long-term issues, overlooking their capability to analyze historical trends and societal changes. Thus, the emphasis on future contributions aligns best with the text's implications.
Which of the following, if true, would most challenge the 'implication' mentioned in the fourth sentence? 'Some experts reject the implication that Çatalhöyük’s farmers cultivated distant fields, since large quantities of grain would have had to be transported.'
- A. Çatalhöyük's farmers obtained through trade the wheat and barley that Rosen analyzed.
- B. Çatalhöyük's farmers understood the impact of soil conditions on crop productivity.
- C. Çatalhöyük's farmers shared wheat and barley fields with neighboring villages.
- D. Çatalhöyük's farmers used wood that deteriorated in the damp environment.
Correct Answer & Rationale
Correct Answer: A
Option A directly challenges the implication that farmers at Çatalhöyük cultivated distant fields by suggesting they obtained the grains through trade instead. This undermines the need for transporting large quantities of grain from faraway locations, thus supporting the idea that local cultivation was not necessary. Option B focuses on soil conditions but does not address the transportation issue, leaving the original implication intact. Option C implies shared resources with neighbors but does not clarify whether these fields were local or distant, failing to challenge the transportation concern. Option D discusses environmental factors unrelated to the cultivation and transport of grain, making it irrelevant to the implication.
Option A directly challenges the implication that farmers at Çatalhöyük cultivated distant fields by suggesting they obtained the grains through trade instead. This undermines the need for transporting large quantities of grain from faraway locations, thus supporting the idea that local cultivation was not necessary. Option B focuses on soil conditions but does not address the transportation issue, leaving the original implication intact. Option C implies shared resources with neighbors but does not clarify whether these fields were local or distant, failing to challenge the transportation concern. Option D discusses environmental factors unrelated to the cultivation and transport of grain, making it irrelevant to the implication.