Question

Based on Backbone, how organisms are classified
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Answer 1

Answer:

Invertebrates - animals without a backbone. Vertebrates - animals with a backbone. The animals have been divided into two groups based on the presence or absence of a backbone. ... Fish, reptiles, birds, amphibians and mammals are different sub-groups of vertebrates - they all have internal skeletons and backbones.

Answer 2

All living organisms are classified into groups based on very basic, shared characteristics. Organisms within each group are then further divided into smaller groups. The classification of living things includes 7 levels: kingdom, phylum, classes, order, families, genus, and species.

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