Biology : PU-CET (U.G) 2016 Panjab University Entrance Exam With Answers

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13.

The Reason Why Antarctic Penguins Are Much Larger Than The Penguins Living In More Temperate Regions Is :

A: Cold Air Contains A Larger Percentage Of Oxygen Than The Warm Air
B: The Fishes On Which Penguins Feed Are Larger In Cold Water Than In Warm Water
C: In Antarctica Penguins Lay Fewer And Larger Eggs Than Penguins In Warm Latitudes
D: Large Penguins Have A Smaller Surface To Volume Ratio Than Small Penguins

The answer is: D

Explanation

The correct answer is D: Large Penguins Have A Smaller Surface To Volume Ratio Than Small Penguins. This means that larger penguins lose less heat to the environment than smaller penguins, which is an advantage in cold climates. This is known as the Bergmann’s Rule, which states that animals living in colder environments tend to be larger than those living in warmer environments.