Question

Why are common names not always useful to biologists?

A. They can apply to more than one animal.
B. They are too long.
C. They require the use of a dichotomous key.
D. They are in Latin.

Answer 1

One reason why many common names are not always useful to biologists is because "They can apply to more than one animal," since terms like "cat" and "dog" refer to large families of animals, not specific ones.