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Lesson: Chapter 13 — The Living World

13.1. Invertebrates 1 of 8

Question 1

On what basis is Kingdom Animalia classified into its two main groups?

The right answer is the one marked above.

Whether or not they bear a backbone, which gives the invertebrates and the vertebrates.

Having wings is a criterion of an artificial classification — it puts birds with insects.

Answer the question to continue.