There are over 2 million kinds of living organisms on earth, and more are being discovered all the time. Scientists divide these things into groups. This book looks at the group of animals classified as vertebrates: fish, amphibians, reptiles, birds and mammals.
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There are over 2 million kinds of living organisms on earth, and more are being discovered all the time. Scientists divide these things into groups. This book looks at the group of animals classified as vertebrates: fish, amphibians, reptiles, birds and mammals.
Read Less