TREE IDENTIFICATION
IDENTIFICATION KEYS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Finches that live on the Galapagos islands have a wide genetic variation in beak shape and size. What caused this variation?
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It was a defense against predators
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They originated from different types of species
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It is an adaptation to the food sources available
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The beak stretched to reach its food and was passed down
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Explanation:
Detailed explanation-1: -The Galápagos finches are a classic example of adaptive radiation. Their common ancestor arrived on the islands a few million years ago. Since then, a single species has evolved into different species that are adapted to fill different lifestyles.
Detailed explanation-2: -He noticed that each finch species had a different type of beak, depending on the food available on its island. The finches that ate large nuts had strong beaks for breaking the nuts open. Finches that ate small nuts and seeds had beaks for cracking nuts and seeds.
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