EVOLUTION
DARWIN’S THEORY OF NATURAL SELECTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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All of these species were birds.
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These species had very little biodiversity.
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Darwin could not study these species without the assistance of other naturalists.
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Many of these species resembled mainland South American species
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Detailed explanation-1: -Darwin observed the Galapagos finches had a graded series of beak sizes and shapes and predicted these species were modified from one original mainland species.
Detailed explanation-2: -During his visit to the islands, Darwin noted that the unique creatures were similar from island to island, but perfectly adapted to their environments which led him to ponder the origin of the islands’ inhabitants. Among those that struck Darwin so greatly were the finches that are now named in his honor.
Detailed explanation-3: -Over time, Darwin began to wonder if species from South America had reached the Galapagos and then changed as they adapted to new environments. This idea-that species could change over time-eventually led to Darwin’s theory of evolution by natural selection.
Detailed explanation-4: -Darwin noted that mockingbirds differed slightly between islands in their size, beak shape and markings but still closely resembled the mockingbirds that he had collected from mainland South America.
Detailed explanation-5: -Darwin noticed that different tortoise species lived on islands with different environments. He realized that the tortoises had traits that allowed them to live in their particular environments. For example, tortoises that ate plants near the ground had rounded shells and shorter necks.