EVOLUTION
MODERN THEORY OF EVOLUTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Island finches were able to breed with mainland species.
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Island finches resembled mainland finches, but were not the same species.
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Island finches resembled extinct species from other islands around the world.
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Island finches did not have beaks of the same size and shape.
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Detailed explanation-1: -1: Darwin’s Finches: Darwin observed that beak shape varies among finch species. He postulated that the beak of an ancestral species had adapted over time to equip the finches to acquire different food sources.
Detailed explanation-2: -One key observation Darwin made occurred while he was studying the specimens from the Galapagos Islands. He noticed the finches on the island were similar to the finches from the mainland, but each showed certain characteristics that helped them to gather food more easily in their specific habitat.
Detailed explanation-3: -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.
Detailed explanation-4: -Some were small. Each one was suited to the availability of particular foodstuffs. Eventually Darwin theorized that different species of finch had evolved on different islands, their distinctive beaks being an adaptation to distinct natural habitats or environmental niches.
Detailed explanation-5: -How did Darwin explain why the finches on the Galapagos Islands look so similar to each other except for their beaks? The finches all have a recent common ancestor but they evolved on different islands where different types of food are available.