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NEETZoologyOrganisms and Populations

The ancestral seed-eating finch, upon arriving at the Galapagos Islands, rapidly diversified into various forms such as insectivorous and vegetarian finches. Which primary ecological condition facilitated this rapid evolutionary process?

Options

  1. APresence of intense interspecific competition with established endemic birds
  2. BUniformity of the island habitats requiring a single specialized adaptation
  3. CAvailability of multiple diverse feeding niches that were previously unoccupied
  4. DExtreme scarcity of all food resources driving rapid mutation rates

Correct answer

C. Availability of multiple diverse feeding niches that were previously unoccupied

Step-by-step solution

The correct answer is the availability of multiple diverse feeding niches that were previously unoccupied. Adaptive radiation is the process of evolution of different species in a given geographical area starting from a point and literally radiating to other areas of geography (habitats). When the ancestral seed-eating finch arrived at the Galapagos Islands, it encountered a variety of food sources (insects, different seeds, vegetation) with no pre-existing competitor birds occupying those roles. This availability

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