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Darwin collected 13 different finches, and each finch had a distinctive ____ specialized for _____.

A. Beak; hunting
B. Tail; flying
C. Claw; climbing
D. Beak; feeding

Answer :

Final answer:

Darwin's finches had distinctive beaks adapted for different types of feeding. This represents natural selection, as beak changes occurred over generations based on the available food sources.

Explanation:

The answer to your question is d) Beak; feeding. Darwin collected finches with varying beak shapes from the Galapagos Islands during his voyage on the HMS Beagle. Darwin observed that the shape of beak was different in each species and postulated that these adaptations occurred over time due to different feeding requirements. For instance, finches which ate seeds had a robust and thick beak to break open the seeds, while those which fed on insects had sharp, spear-like beaks.

This change in beak shape and size according to the food source is an example of evolution by natural selection. Later studies conducted by Peter and Rosemary Grant on these finches provided further evidence to support Darwin's theory. When availability of food sources changed, the average beak size in the finch population also changed; in periods of abundant small seeds, smaller-beaked finches thrived, and in times when larger seeds were present, larger-beaked finches survived better.

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