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
Both authors indicate that meeting the world's food needs should not come at the expense of:
- A. innovative farming practices
- B. environmental integrity
- C. humane treatment of animals
- D. economic development
Correct Answer & Rationale
Correct Answer: B
Meeting the world’s food needs should prioritize environmental integrity, as it ensures sustainable practices that protect ecosystems for future generations. If environmental health is compromised, long-term agricultural productivity is at risk. Option A, innovative farming practices, while important, can still be pursued without sacrificing environmental integrity. Option C, humane treatment of animals, is critical but may not directly relate to the broader environmental concerns outlined by the authors. Option D, economic development, is essential for food security, but it should not overshadow the imperative of maintaining ecological balance.
Meeting the world’s food needs should prioritize environmental integrity, as it ensures sustainable practices that protect ecosystems for future generations. If environmental health is compromised, long-term agricultural productivity is at risk. Option A, innovative farming practices, while important, can still be pursued without sacrificing environmental integrity. Option C, humane treatment of animals, is critical but may not directly relate to the broader environmental concerns outlined by the authors. Option D, economic development, is essential for food security, but it should not overshadow the imperative of maintaining ecological balance.
The final paragraph suggests that seeing the woman has caused the narrator to:
- A. face the negative feelings she has about her new home
- B. realize that she misses her mother more than she admits
- C. think about her own feelings about her family and background
- D. remember the reason she moved away from her home country
Correct Answer & Rationale
Correct Answer: C
The final paragraph emphasizes the narrator's introspection triggered by seeing the woman, leading her to reflect on her own feelings about family and background. This deep connection to identity is central to her experience. Option A misinterprets the focus; while negative feelings may exist, the emphasis is on personal reflection rather than facing negativity. Option B suggests a specific emotion related to her mother, which is not explicitly indicated in the text. Option D implies a recollection of her reasons for moving, but the paragraph centers more on her current emotional state rather than past motivations.
The final paragraph emphasizes the narrator's introspection triggered by seeing the woman, leading her to reflect on her own feelings about family and background. This deep connection to identity is central to her experience. Option A misinterprets the focus; while negative feelings may exist, the emphasis is on personal reflection rather than facing negativity. Option B suggests a specific emotion related to her mother, which is not explicitly indicated in the text. Option D implies a recollection of her reasons for moving, but the paragraph centers more on her current emotional state rather than past motivations.
In context, 'Telemundo' and 'Ms. magazine' serve as examples of media that:
- A. devised similar marketing techniques
- B. were created by the same media visionary
- C. underwent profound changes as a result of Johnson's work
- D. were designed to appeal to particular groups of consumers
Correct Answer & Rationale
Correct Answer: D
Both 'Telemundo' and 'Ms. magazine' were designed to cater to specific audiences, focusing on the needs and interests of their respective consumer groups. Telemundo targets the Hispanic community, providing culturally relevant content, while Ms. magazine addresses feminist issues and women’s rights. Option A is incorrect as there is no evidence that both utilized similar marketing techniques. Option B is misleading; they were not created by the same visionary. Option C is inaccurate; while Johnson's work influenced media, it did not specifically lead to profound changes in either outlet.
Both 'Telemundo' and 'Ms. magazine' were designed to cater to specific audiences, focusing on the needs and interests of their respective consumer groups. Telemundo targets the Hispanic community, providing culturally relevant content, while Ms. magazine addresses feminist issues and women’s rights. Option A is incorrect as there is no evidence that both utilized similar marketing techniques. Option B is misleading; they were not created by the same visionary. Option C is inaccurate; while Johnson's work influenced media, it did not specifically lead to profound changes in either outlet.
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.