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Difficulty: HardWords in Context: High-Utility Vocabulary

Although evolutionary biologists historically viewed the relationship between host organisms and their microbiome as primarily adversarial, recent research reveals a more cooperative dynamic. Indeed, certain bacterial species do not merely coexist with their hosts; they actively ________ host physiological processes, such as digestion and immune response, to the point where the host's survival depends on these symbiotic interactions.

Which choice completes the text with the most logical and precise word or phrase?

  1. A
    stifle
  2. B
    mimic
  3. modulateAnswer
  4. D
    supplant

Answer

modulate
The word 'modulate' is correct because the passage describes a cooperative relationship where bacteria actively adjust, modify, or regulate host processes like digestion and immunity.

Step-by-Step Solution

1
Analyze the context of the blank within the passage.
The passage describes a shift from viewing host-microbiome relations as adversarial to cooperative and symbiotic, noting that bacteria actively affect host physiological processes (digestion, immune response) essential for survival.
This establishes that the blank must be filled with a verb that describes a cooperative, regulating, or modifying action on these physiological processes.
2
Evaluate the choices to find the word that best fits this role.
The word 'modulate' means to regulate or adjust, which perfectly aligns with the bacteria's active role in influencing the host's systems. The other words either introduce a negative tone ('stifle') or incorrect actions ('mimic', 'supplant').
This determines that 'modulate' is the most logical and precise word.

Key Concept

Selecting words in context based on academic usage and semantic precision.
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Topics

Words in Context: High-Utility Vocabulary

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