Which of the following best explains how the finches on the Galapagos Islands demonstrate natural selection?

A. Finches with beak shapes suited to their specific food sources survived and reproduced more successfully.

B. The finches migrated to the Galapagos Islands from different continents.

C. The finches on the islands do not exhibit any variation in their beak shapes.

D. All of the finches have the same beak shape because they eat the same food.

The finches on the Galapagos Islands demonstrate natural selection through their varied beak shapes, which are adapted to their specific food sources. Those with beak shapes best suited to their environment survive and reproduce more successfully. This illustrates how natural selection leads to evolutionary change within species.

Explanation:

Understanding Natural Selection in Galapagos Finches

The finches on the Galapagos Islands are a classic example of natural selection in action. These birds have evolved different beak shapes depending on the type of food they consume. For instance, finches that have hard seeds as a food source have stronger, thicker beaks that are better suited for cracking those seeds. Conversely, finches that primarily consume insects have slender, sharp beaks to catch their prey.

This variation in beak shape is crucial because it impacts their survival and reproductive success. Finches with beak shapes most suited to their environment and available food sources are more likely to survive, reproduce, and pass on their beneficial traits to the next generation, demonstrating the principles of natural selection.

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