Question

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

1. Continental drift
2. Glacial cycles

Select the correct option using the option given below:
(a) Only 1
(b) Only 2
(c) Both 1 and 2
(d) Neither 1 nor 2

Answer 1

Option C - Both 1 and 2

More Information

Impact of Continental Drift on Evolution :-

• According to continental drift theory of Wegener, all the continents formed a single continental mass and mega ocean surrounded the same. The supercontinent was named Pangaea, which meant all earth. The mega-ocean was called Panthalassa, meaning all water.

• According to it, organisms of single landmass were redistributed around the world and adapted to their respective climatic conditions and developed specific traits, which led to evolution of different species over thousands of years of evolution.

Role of glacial cycle in evolution of organisms :-

• The Pleistocene glacial periods have been regarded as major factors influencing the geographical distribution, demographic dynamics, and patterns of genetic diversity of species.

• During different periods of the glacial cycle, organisms adapted to changing climatic conditions which led to formation of different traits among them. This led to evolution of organisms.

__________

Answer 2

Option C - Both 1 and 2

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