Nhận biết (M1)

Dubautia carrii is among the twenty-eight species of silversword plants found only on the Hawaiian archipelago that collectively illustrate the process of adaptive radiation, or the rapid diversification of an ancestral species into different, related species. Each silversword species is physically distinct, with mature plant forms ranging from trees and shrubs to vines. However, they all descended from a common tarweed plant species, with their unique physical characteristics emerging as they adapted to the archipelago’s many specific habitats over time.

Which choice best states the main idea of the text?

• A.

  All silverswords that grow on the Hawaiian archipelago have similar physical characteristics.

• B.

  The Hawaiian archipelago exhibits many distinct habitats and species.

• C.

  Most plants that grow on the Hawaiian archipelago are descendants of a single founder species.

• D.

  Silverswords are good examples of adaptive radiation on the Hawaiian archipelago.