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 2 would most likely respond to the statement in the fifth sentence of Passage 1 ('Environmentalists must face the fact that unless high-yield crop varieties, pesticides, and fertilizers are widely used in developing nations, the world's food supply will be outstripped by spiraling demand') by arguing that:
- A. industrialized nations pose a greater threat to the environment than do developing nations
- B. many fertilizers are organic substances that produce no ill effects in humans
- C. agricultural chemicals can be used on a small scale and still significantly improve crop yields
- D. the use of pesticides is unnecessary if high-yield crop varieties are adopted
Correct Answer & Rationale
Correct Answer: C
Option C aligns with the idea that improving crop yields can be achieved through targeted use of agricultural chemicals, suggesting a balanced approach rather than widespread reliance. This reflects the author's likely advocacy for sustainable practices that enhance productivity without overwhelming environmental concerns. Option A diverts the focus to industrialized nations, which may not directly address the statement's emphasis on developing nations' agricultural needs. Option B incorrectly implies that all fertilizers are harmless, overlooking potential environmental impacts. Option D dismisses the potential benefits of pesticides entirely, which may not align with the author's nuanced view on agricultural practices.
Option C aligns with the idea that improving crop yields can be achieved through targeted use of agricultural chemicals, suggesting a balanced approach rather than widespread reliance. This reflects the author's likely advocacy for sustainable practices that enhance productivity without overwhelming environmental concerns. Option A diverts the focus to industrialized nations, which may not directly address the statement's emphasis on developing nations' agricultural needs. Option B incorrectly implies that all fertilizers are harmless, overlooking potential environmental impacts. Option D dismisses the potential benefits of pesticides entirely, which may not align with the author's nuanced view on agricultural practices.
It can most reasonably be inferred from the passage that the music products industry would have a higher share of the e-commerce market if:
- A. entry-level school music instruments were sold to schools' music directors rather than directly to students
- B. the consumer market were to place less value on convenience and variety and more on competitive pricing
- C. a few types of music products sold predominantly in brick-and-mortar stores were excluded from the calculation
- D. brick-and-mortar store managers improved customer service and provided better training for their installation experts
Correct Answer & Rationale
Correct Answer: C
The inference about the music products industry’s higher e-commerce market share hinges on the exclusion of certain products sold mainly in physical stores. If these items are not considered, the e-commerce segment could appear more dominant. Option A suggests a shift in sales strategy, but it doesn’t directly impact the overall market share dynamics. Option B misplaces the focus on consumer preferences, which does not inherently increase e-commerce share. Option D addresses customer service improvements in physical stores, which would not enhance online sales. Thus, excluding certain products from the calculation is the most logical inference for a higher e-commerce share.
The inference about the music products industry’s higher e-commerce market share hinges on the exclusion of certain products sold mainly in physical stores. If these items are not considered, the e-commerce segment could appear more dominant. Option A suggests a shift in sales strategy, but it doesn’t directly impact the overall market share dynamics. Option B misplaces the focus on consumer preferences, which does not inherently increase e-commerce share. Option D addresses customer service improvements in physical stores, which would not enhance online sales. Thus, excluding certain products from the calculation is the most logical inference for a higher e-commerce share.
In sentence 13, the narrator most likely uses the image of 'a tightly woven fruit basket' to suggest that the rain is:
- A. a physical challenge that must be endured
- B. falling so heavily that she can barely see through it
- C. a reminder of the weather in harvest season
- D. important because it allows crops to survive
Correct Answer & Rationale
Correct Answer: A
The image of "a tightly woven fruit basket" conveys the idea of resilience and endurance, suggesting that the rain is a challenge that must be faced. This metaphor implies that just like a tightly woven basket holds its contents together despite external pressures, the narrator must endure the rain's intensity. Option B misinterprets the imagery; while heavy rain can obscure vision, the metaphor focuses more on endurance than visibility. Option C incorrectly links the rain to harvest season, which is not implied in the context. Option D, while true about rain's importance for crops, does not capture the struggle suggested by the basket imagery.
The image of "a tightly woven fruit basket" conveys the idea of resilience and endurance, suggesting that the rain is a challenge that must be faced. This metaphor implies that just like a tightly woven basket holds its contents together despite external pressures, the narrator must endure the rain's intensity. Option B misinterprets the imagery; while heavy rain can obscure vision, the metaphor focuses more on endurance than visibility. Option C incorrectly links the rain to harvest season, which is not implied in the context. Option D, while true about rain's importance for crops, does not capture the struggle suggested by the basket imagery.
What assumption does the author of the passage make?
- A. Gases produced by algae will be cheaper to produce than other gases.
- B. The Department of Energy is already using hydrogen-producing algae as a source of energy.
- C. Mutant versions of algae will not be capable of the process of photosynthesis.
- D. Readers do not associate the Department of Energy with algae research.
Correct Answer & Rationale
Correct Answer: D
The assumption that readers do not associate the Department of Energy with algae research is supported by the passage's context, which aims to highlight the potential of algae in energy production. This suggests a need to clarify the Department's involvement. Option A is incorrect as the passage does not provide a comparison of costs related to gas production. Option B is misleading; the passage does not confirm the Department's current use of hydrogen-producing algae. Option C is not supported; the passage does not address the capabilities of mutant algae in photosynthesis. Thus, option D aligns with the author's intent to bridge a knowledge gap.
The assumption that readers do not associate the Department of Energy with algae research is supported by the passage's context, which aims to highlight the potential of algae in energy production. This suggests a need to clarify the Department's involvement. Option A is incorrect as the passage does not provide a comparison of costs related to gas production. Option B is misleading; the passage does not confirm the Department's current use of hydrogen-producing algae. Option C is not supported; the passage does not address the capabilities of mutant algae in photosynthesis. Thus, option D aligns with the author's intent to bridge a knowledge gap.