Question

Who divided the animals into $2$ groups, those which had red blood and those that did not?

• A. Whittaker
• B. T.O. Diener
• C. Aristotle
• D. W.M. Stanley

Answer 1

The correct option is C Aristotle

Aristotle developed the first system of classification of animals. He based his classification system off of observations of animals, and used physical characteristics to divide animals into two groups, and then into five genera per group, and then into species within each genus. Aristotle's two major groups of animals are dependent on whether or not they have "red blood." Animals with red blood correspond to vertebrates, and animals without red blood correspond to invertebrates.

Hence the correct option is C.