Like other amphibians, the wood frog ( Rana sylvatica ) is unable to generate its own heat, so during periods

Question

Like other amphibians, the wood frog ( Rana sylvatica ) is unable to generate its own heat, so during periods of subfreezing temperatures, it ______ blank by producing large amounts of glucose, a sugar that helps prevent damaging ice from forming inside its cells. Which choice completes the text so that it conforms to the conventions of Standard English?

Accepted Answer

Choice D is the best answer. The convention being tested is the use of verbs to express tense. In this choice, the present tense verb &ldquo;survives&rdquo; correctly indies that the wood frog regularly survives subfreezing temperatures by producing large amounts of glucose. Choice A is incorrect because the past perfect verb &ldquo;had survived&rdquo; doesn&rsquo;t indie that the wood frog regularly survives subfreezing temperatures by producing large amounts of glucose. Choice B is incorrect because the past tense verb &ldquo;survived&rdquo; doesn&rsquo;t indie that the wood frog regularly survives subfreezing temperatures by producing large amounts of glucose. Choice C is incorrect because the conditional verb &ldquo;would survive&rdquo; doesn&rsquo;t indie that the wood frog regularly survives subfreezing temperatures by producing large amounts of glucose.

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