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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traits are not hereditary.
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living things change over time.
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birds are different than other species.
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organisms in a species have no relation to one another.
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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: -Later, Darwin concluded that several birds from one species of finch had probably been blown by storm or otherwise separated to each of the islands from one island or from the mainland. The finches had to adapt to their new environments and food sources. They gradually evolved into different species.
Detailed explanation-3: -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-4: -Fossil evidence supports evolution. You have read that Darwin collected many specimens of fossils on his trip. These specimens provided evidence that species existing in the past were very similar to species living during Darwin’s time.