Question:

Darwin's finches provide excellent evidence in favour of organic evolution. These are related to which of the following evidences?

Updated On: Jul 27, 2022
  • Embryology
  • Palaeontology (or fossils)
  • Anatomy
  • Biogeography(or geographic distribution)
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The Correct Option is D

Solution and Explanation

Biogeography is the study of the geographical distribution of life forms on earth. Darwin undertook a voyage on the ship HMS Beagle. The ship traveled the Southern Hemisphere where life is most abundant and varied. Along the way, Darwin found different forms of life vary different, from those in England. As he sailed southward along the South America, he found that similar species replaced each other. He thought that related species could have been modified according to the environment His views got confirmed on Galapagos islands (small group of volcanic islands off the Western coasts of South America). Darwin found different modified forms of finches which seemed to have descended from mainland finches as a result of the natural selection.
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Concepts Used:

Evolution

Evolution is a process that occurs in changes in the genetic content of a population over time. Evolutionary change is generally classified into two: microevolution and macroevolution. The process of changes in allele frequencies in a population over time is a microevolutionary process. Three main mechanisms that cause allele frequency change are natural selection, genetic drift, and gene flow. On the other hand, macroevolution refers to change at or above the level of the species.