Digital PSAT Reading and Writing Practice Question 211: Answer and Explanation

Question: 211

There are a number of more indirect, ecologically-oriented ways in which the microbiome confers protection to its host. Abundant colonization of our bodies by benign microorganisms, for example, inhibits the overgrowth of more dangerous ones through the sheer depletion of microbial nutrients. This notion of ecological balance has been of particular interest to scientists studying the microbiome, as it hinges upon both the variable diversity of species that colonize an individual as well as factors that affect the dynamism of a micro biotic population.

As used in the text, the word hinges most closely means

  • A. fulcrums.
  • B. analyzes.
  • C. depends.
  • D. joints.

Correct Answer: C

Explanation:

(C) Depends works best here since the line refers to ecological balance being contingent on two things. It would be incorrect to say the balance fulcrums, analyzes, or joints on two things.

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