The Greek scientist, Aristotle was one of the first scientists to organize living things. Taxonomy is the science of how living things are grouped together.
Aristotle developed the first classification system, which divided all known organisms into two groups i.e. animals and plants.
He used simple morphological characters to classify plants into trees, shrubs, and herbs. He also divided animals into three groups based on their habitats.
But the classification wasn’t justified. Animals in each group have nothing in common, other than their habitat (except few).