Civil Services Prep

Prelims 2014 · Environment · Question 73

Which of the following phenomena might have influenced the evolution of organisms?

  1. Continental drift
  2. Glacial cycles.

Select the correct answer using the code given below.

  1. 1 only
  2. 2 only
  3. Both 1 and 2
  4. Neither 1 nor 2

Answer

Both 1 and 2

1. Continental drift — Movement of continents changed isolation and connectivity of landmasses, altering habitats and causing speciation. Verdict: Correct.

2. Glacial cycles — Repeated ice ages and interglacial periods changed climate, sea levels, and migration patterns, influencing natural selection and evolution. Verdict: Correct.

Hence, both 1 and 2 might have influenced the evolution of organisms.

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