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Evolution — BIOLOGY STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceBIOLOGYEvolution1 Mark
MCQ
Role of isolation in evolution is:
  • A
    Differentiation of species.
  • B
    Maintenance of species.
  • C
    Evolutionary divergence.
  • D
    Extermination of species.
✓

Answer

  1. Evolutionary divergence.

Explanation:

Speciation that occurs when one population becomes geographically separated from the rest of the species and subsequently evolves by natural selection and /or genetic drift is known as allopatric speciation. 

Allopatric speciation is the most common method of speciation and accounts for almost all evolution of new animal species.

Differentiation of species is a wrong option because individuals show differentiation not species. Isolation is not related to maintenance or extermination of species.

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