A model created by biologist Luis Valente predicts that the rate of speciation-the rate at which new species form-on an

Question

A model created by biologist Luis Valente predicts that the rate of speciation—the rate at which new species form—on an isolated island loed approximately 5,000 kilometers from the nearest mainland blank triple the rate of speciation on an island only 500 kilometers from the mainland.

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 finite and nonfinite verb forms within a sentence. Relative clauses, such as the one beginning with &ldquo;that,&rdquo; require a finite verb, a verb that can function as the main verb of a clause. This choice correctly supplies the clause with the finite future tense verb &ldquo;will be.&rdquo; Choice A is incorrect because the nonfinite participle &ldquo;being&rdquo; doesn&rsquo;t supply the clause with a finite verb. Choice B is incorrect because the nonfinite to-infinitive &ldquo;to be&rdquo; doesn&rsquo;t supply the clause with a finite verb. Choice C is incorrect because the nonfinite to-infinitive &ldquo;to have been&rdquo; doesn&rsquo;t supply the clause with a finite verb.

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