EVOLUTION
MODERN THEORY OF EVOLUTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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New species can appear gradually through small changes in an ancestral species.
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The amount of variation in a population is related to the type of environment it lives in.
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Organisms have only the number of offspring that are supported by the environment.
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Some traits appear in each generation, while others seem to disappear in some generations.
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Detailed explanation-1: -What hypothesis did Darwin investigate by studying the breeding of pigeons with distinctive traits?-New species can appear gradually through small changes in an ancestral species.-The amount of variation in a population is related to the type of environment it lives in.
Detailed explanation-2: -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.
Detailed explanation-3: -What hypothesis did Darwin investigate by studying the breeding of pigeons with distinctive traits? New species can appear gradually through small changes in ancestral species.
Detailed explanation-4: -The most studied animals on the Galápagos are finches, a type of bird (Figure below). When Darwin first observed finches on the islands, he did not even realize they were all finches. But when he studied them further, he realized they were related to each other. Each island had its own distinct species of finch.
Detailed explanation-5: -Darwin’s greatest contribution to science is that he completed the Copernican Revolution by drawing out for biology the notion of nature as a system of matter in motion governed by natural laws. With Darwin’s discovery of natural selection, the origin and adaptations of organisms were brought into the realm of science.