Question

Jordan rule in ecology suggests

• A. Cold regions have small animals
• B. Cave dwellers have large eyes
• C. Decreasing temperature increase the number of vertebrae or vertebral number increase with latitude
• D. Extremities are relatively short in cooler regions

Answer 1

The correct option is C Decreasing temperature increase the number of vertebrae or vertebral number increase with latitude

Jordan stated the rule that the number of vertebrae in fishes increases with the latitude. This is known as the Law of Vertebrae or the Jordan rule. According to this law, in the case of certain groups of fishes, the fishes which are found in the cold-water or regions have a larger number of vertebrae than those members which are found in tropical regions.

Thus, the correct answer is option C.