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Question

Difficulty: HardMulti-Blank Text Completion: Cross-Sentence Contextual Coherence

For decades, oceanographers assumed that deep-sea benthic ecosystems were structurally (i)________, maintained only by the slow, continuous descent of organic detritus from surface waters. However, recent autonomous submersibles revealed that episodic, high-magnitude pulse events—such as whale falls and turbidity currents—exert a far more (ii)________ influence on benthic biodiversity than previously acknowledged. Consequently, rather than exhibiting a static equilibrium, these abyssal communities undergo dynamic cycles of disruption and recovery, rendering traditional steady-state ecological models fundamentally (iii)________.

Which set of terms, when inserted into the blanks, best preserves the cross-sentence structural and contextual coherence of the passage?

  1. (i) quiescent, (ii) decisive, (iii) anachronisticAnswer
  2. B
    (i) fragile, (ii) negligible, (iii) indispensable
  3. C
    (i) uniform, (ii) transient, (iii) rudimentary
  4. D
    (i) quiescent, (ii) decisive, (iii) indispensable
  5. E
    (i) fragile, (ii) transient, (iii) anachronistic

Answer

(i) quiescent, (ii) decisive, (iii) anachronistic
The combination consisting of 'quiescent', 'decisive', and 'anachronistic' establishes complete cross-sentence structural coherence. Sentence 1 sets up the historic assumption of a placid ('quiescent') benthic environment. Sentence 2 uses the contrast signal 'However' to show that sudden events have a major ('decisive') impact. Sentence 3 uses 'Consequently' to deduce that older steady-state frameworks are now obsolete ('anachronistic').

Step-by-Step Solution

1
Analyze blank (i) in the context of the opening premise
The first sentence describes an assumption that deep-sea benthic ecosystems were calm, unchanging, and fed only by slow organic descent. 'Quiescent' (dormant or tranquil) accurately captures this initial assumed state.
Establishing the initial baseline assumption is critical before evaluating the contrast signal.
2
Evaluate the pivot signal 'However' for blank (ii)
The second sentence introduces episodic, high-magnitude events that challenge the initial assumption. The word filling blank (ii) must denote a strong or major effect; 'decisive' correctly indicates a crucial, powerful influence.
The contrast transition requires a word opposing the previous notion of minimal or passive activity.
3
Determine blank (iii) using the cause-and-effect marker 'Consequently'
Because the abyssal communities experience dynamic cycles rather than static equilibrium, traditional steady-state models no longer apply and are rendered 'anachronistic' (outdated/misaligned with present findings).
The final conclusion must logically follow from the structural failure of old steady-state models.

Key Concept

Multi-Blank Text Completion: Cross-Sentence Contextual Coherence
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Multi-Blank Text Completion: Cross-Sentence Contextual Coherence

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