Vertebrates, animals with backbones, are divided into the following five major groups: fish, reptiles, amphibians, birds, and mammals. Some characteristics of these groups are given in the table below.
Which statement is true if an animal lives in water, does not lay eggs, and is warm- blooded?
Exhibit:

- a fish
- a reptile
- a mammal
- an amphibian
- a bird
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