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Question

Difficulty: EasyLogical Inferences

Many desert reptiles are active primarily during the early morning and late evening, when air temperatures are moderate. During the hottest hours of the day, these reptiles retreat into deep underground burrows, where temperatures remain significantly cooler than at the surface. Because these species cannot internally regulate their body temperature, they rely entirely on external environments to avoid overheating. If surface temperatures remain excessively high for an extended portion of the day, the reptiles must remain in their burrows to survive. Which choice most logically completes the text?

  1. A
    increase their surface activity during the hottest midday hours.
  2. spend less time active on the surface than they would under more moderate conditions.Answer
  3. C
    develop physiological mechanisms to internally regulate their body temperature.
  4. D
    migrate to areas where underground burrows are unnecessary for survival.

Answer

spend less time active on the surface than they would under more moderate conditions.
The correct answer is supported by the text, which states that the reptiles must remain in their burrows to survive when surface temperatures are excessively high. Consequently, if high surface temperatures last longer, the reptiles will be forced to stay underground longer, resulting in less time spent active on the surface than under moderate conditions.

Step-by-Step Solution

1
Identify the main premises of the passage.
The reptiles cannot internally regulate body temperature, rely on external temperatures, and must stay in underground burrows to survive during extremely hot periods.
To build a logical connection based on the facts provided.
2
Analyze the conditional statement at the end.
If surface temperatures remain excessively high for an extended portion of the day, the reptiles must stay in their burrows.
To determine what direct outcome must follow from this condition.
3
Deduce the logical consequence of the reptiles staying in their burrows longer.
They will have less time remaining in the day to be active on the surface.
To identify the choice that represents a direct, non-speculative inference from the text.

Key Concept

Logical Inferences
Estimated Time:45s
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Topics

Logical Inferences

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