Inferences

SAT Reading and Writing· difficulty 3/5

Some flowering plants have evolved long, narrow floral tubes whose nectar is accessible only to pollinators with correspondingly long proboscises or beaks. Charles Darwin, examining a Madagascan orchid with a foot-long nectar tube, predicted that a moth with a similarly long proboscis must exist on the island, though no such moth was then known to science. Decades after his death, just such a moth was documented, with a proboscis of the predicted length.

Based on the passage, which inference is most strongly supported?

  • A

    Plant features evolve independently of any animal species

  • B

    Floral and pollinator features can offer reciprocal evidence about each other

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  • C

    Darwin's prediction was based on observation of the moth itself

  • D

    All orchids depend on long-proboscis moths

Explanation

Predicting a pollinator from a plant feature, later confirmed, supports A. B, C, D contradict the passage.

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