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according to Darwin how did " descent with modification" occur? which three factors were necessary for...

according to Darwin how did " descent with modification" occur?

which three factors were necessary for natural selection to occur among the finches on Daphne major in the grants study?

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Expert Solution

According to Chales Darwin, the theory of evolution is based on fundamentals of decent of modification which is defined as the passing traits or genetic information from parents to their offsprings. According to Darwin there were three factors responsible for descent to modification to occur: mutation, migration and genetic drift.

In Grants study, the factors responsible for natural selection to occur among the finches on Daphne major are

  1. The environmental factor of drought of 1977 which lasted for 551 days. Due to this the next generation was observed to have larger beaks.
  2. The reproduction factor observed where female finches are more likely to mate with male finches of same size beak.
  3. The natural advantage for medium finches with larger beaks for their access to alternate food sources as they crack open larger seeds. In contrast the small beak size finches cannot, hence they starved and died.

gladiator answered 1 year ago
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