OBJECTIVE LIFE SCIENCE
EVOLUTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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only through artificial selection
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during half-life periods of 5, 715 years
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because of natural selection
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so rapidly that it can be observed easily
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Detailed explanation-1: -Darwin and a scientific contemporary of his, Alfred Russel Wallace, proposed that evolution occurs because of a phenomenon called natural selection. In the theory of natural selection, organisms produce more offspring than are able to survive in their environment.
Detailed explanation-2: -The mechanism that Darwin proposed for evolution is natural selection. Because resources are limited in nature, organisms with heritable traits that favor survival and reproduction will tend to leave more offspring than their peers, causing the traits to increase in frequency over generations.
Detailed explanation-3: -Darwin’s theory of natural selection has the following postulates: All organisms have a high capacity to reproduce. Reproduction results in variations. High reproduction rate puts a pressure on the environmental resources. Limited availability of the resources will cause the species to struggle for existence.