Q.
Which of the following is incorrect about Darwinian variations?
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NTA AbhyasNTA Abhyas 2020Evolution
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Solution:
Mutation: Mutations are also known as discontinuous variations. Experiments on microbes show that pre-existing advantageous mutations help the organisms to get selected and the result is observed in new phenotypes. This may lead to speciation over a few generations. The concept of discontinuous variation was given by Hugo de Vries.
Darwinism consider the accumulation of small, directional and continuous variation among the organisms of a species that results in speciation gradually.