Question:

The classical example of adaptive radiation in development of new species is

Updated On: Jul 29, 2022
  • Darwin finches
  • marsupials of Australia
  • giant turtle
  • all of these
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The Correct Option is D

Solution and Explanation

Adaptive radiation is the evolutionary diversification from a single ancestral (prototype) population of descendant population into more and more numerous adaptive zones and ecological niches. It may involve both Anagenesis and cladogenesis. The examples of adaptive radiations are Darwin finches of Galapagos islands, Australian marsupials and limbs of mammals.
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Concepts Used:

Mechanisms of Evolution

The mechanism of evolution has been explained with theories such as the Big Bang Theory, the Theory of Darwin, and the Hardy-Weinberg Equilibrium where evolution is the process of natural selection that causes changes in the traits of species over multiple generations. 

The Big Bang Theory:

The most widely accepted theory for the origin of life on Earth and its various forms is the Big Bang Theory. According to the hypothesis, as a result of a massive explosion, the universe was created 20 billion years ago.

Hardy-Weinberg Equilibrium:

According to the idea of Hardy-Weinberg, allelic frequency and gene pool remain stable throughout generations. Furthermore, the allelic frequencies add up to 1.

Theory of Darwin:

The Theory of Darwin's natural selection hypothesis provided a more reasonable explanation for the emergence of new species. As a result of adaptation to changing environmental conditions, natural selection led to the evolution of multiple species from a single species.