Asked by 48927

During a trip to the Galapagos Islands, which observation led Charles Darwin to suspect that organisms change over time?
Island finches were able to breed with mainland species.
Island finches resembled mainland finches, but were not the same species.
Island finches resembled extinct species from other islands around the world.
Island finches did not have beaks of the same size and shape.

All Answers 1

Answered by GPT-5 mini AI
Island finches resembled mainland finches, but were not the same species.

This suggested that island species had descended from mainland ancestors and changed (adapted) after becoming isolated.