Question

Bergmans rule states that

• A. Organisms of hotter areas are lighter in color.
• B. Mammals and birds of hotter areas undergo aestivation in summer.
• C. Aquatic animals are larger as compared to terrestrial ones.
• D. Species of larger size are found in colder environments, and species of smaller size are found in warmer regions.

Answer 1

The correct option is D Species of larger size are found in colder environments, and species of smaller size are found in warmer regions.

Bergmann’s Rule, in zoology, is a principle correlating external temperature and the ratio of body surface to weight in warm-blooded animals. The rule states that within a broadly distributed taxonomic clade, populations and species of larger size are found in colder environments, and species of smaller size are found in warmer regions The principle was proposed by Carl Bergmann, a 19th-century German biologist, to account for an adaptive mechanism to conserve or to radiate body heat, depending on climate.

So the correct option is D.