UPSC CSE Prelims
Question 31
Which of the following phenomena might have influenced the evolution of organisms?
- Continental drift
- Glacial cycles
Select the correct answer using the code given below.
View correct answer and explanation
Correct answer: C
Correct Option: C
Explanation: Both tectonic movement and climate oscillations can isolate populations, shift habitats and impose evolutionary selection pressures.
Statement/Pair-wise Analysis:
Statement/Item 1: Correct - Continental drift changes geographic barriers and species distributions over geological time.
Statement/Item 2: Correct - Glacial cycles repeatedly change temperature, sea levels and habitats, influencing selection and migration.
Option-wise Analysis:
A: Incorrect - omits correct statement/item 2.
B: Incorrect - omits correct statement/item 1.
C: Correct - includes all and only the correct items.
D: Incorrect - omits correct statement/items 1, 2.