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UPSC 2014: 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.
(a)1 only
(b)2 only
(c)Both 1 and 2
(d)Neither 1 nor 2
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Not attemptedCorrect Answer: (c) Both 1 and 2
Continental drift alters land-masses, isolates populations and drives speciation, as evidenced by biogeographic studies of plant and animal lineages. Repeated Pleistocene glacial–interglacial cycles acted as a “diversity pump”, fragmenting and reconnecting populations and thereby influencing evolutionary trajectories. Both statements are therefore correct. ([nature.com](https://www.nature.com/articles/211116a0?utm_source=openai))
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Frequently Asked Questions
What is the correct answer to this UPSC 2014 Science & Technology question?▼
The correct answer is option (c): Both 1 and 2. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Biology question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 2014, GS Paper 1, as Question 13. It falls under Science & Technology > Biology.
What is the difficulty level of this UPSC question?▼
This question is rated "moderate". It requires sound conceptual understanding of the topic.
How many UPSC Prelims questions have been asked from Biology?▼
UPSC has asked 97 questions from Biology (under Science & Technology) across multiple years. Visit the topic page to see the full list and year-wise trends.