How did Aristotle classified animals on the basis of?

Answer 1

Aristotle's classification of animals grouped together animals with similar characters into genera (used in a much broader sense than present-day biologists use the term) and then distinguished the species within the genera. He divided the animals into two types: those with blood, and those without blood (or at least without red blood). These distinctions correspond closely to our distinction between vertebrates and invertebrates. The blooded animals, corresponding to the vertebrates, included five genera: viviparous quadrupeds (mammals), birds, oviparous quadrupeds (reptiles and amphibians), fishes, and whales (which Aristotle did not realize were mammals). The bloodless animals were classified as cephalopods (such as the octopus); crustaceans; insects (which included the Spiders, scorpions, and centipedes, in addition to what we now define as insects); shelled animals (such as most molluscs and echinoderms); and "zoophytes," or "plant-animals," which supposedly resembled plants in their form -- such as most cnidarians.

Answer 2

Animal's classifications were done by the famous Greek philosopher, Aristotle (384-322 B.C.).

For this reason, he is known as the Father of zoology.

The animals were divided into two main groups:

1. Anaima : Animals without red blood comprise this group, which is further subdivided into five sub-groups:

a. Sponges and Coelenterata

b. Insects and Spiders

c. Crustacea

d. Cephalopoda

e. Mollusca and Echinodermata.

2. Enaimas Animals with red blood comprise this group, which is further subdivided into two sub-groups:

a. Vivipara: Viviparous animals.

b. Ovipara: Oviparous animals.

Answer 3

By their physical traits and habbitats

Answer 4

habitat and physical differences.