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.
Students find out about the characteristics, life cycles, and habitats of each group of animals. They discover the ways in which vertebrates have adapted to survive. Students learn how some animals are threatened with extinction and why we need to make sure that a diversity of animals are protected for the future.
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