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The Grants' study on the island of Daphne Major studied what organisms?

A. Galápagos tortoises
B. Galápagos iguanas
C. Galápagos mockingbirds
D. Galápagos finches

Answer :

Final answer:

The Grants' study on Daphne Major researched Galápagos finches, particularly how changes in their environment led to a selection for specific physical traits, a principle of Darwin's theory of evolution. Thus, option D is correct.

Explanation:

The Grants' study on the island of Daphne Major focused on Galápagos finches. These finches are significant in the study of evolution because each island's population of finches had differences in beak size and shape that were adaptations to their specific environments. The work of the Grants built upon Darwin's initial observations and further illuminated the concept of natural selection. Specifically, they observed how a severe drought on Daphne Major led to a change in food availability, which in turn altered the physical characteristics of the finch population through a process known as directional selection. Thus, option D is correct.

In a broader context, Darwin famously studied various organisms in the Galápagos including Galápagos tortoises, iguanas, and mockingbirds. Each of these species provided insights into how different environmental conditions can lead to the diversification of species—a fundamental aspect of what would be known as his theory of evolution.

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