Classification of Vertebrates

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Which class of animal has skin with fur or hair, feeds their young milk and maintains a constant body temperature?

Animals that do not have a backbone are called:

The five classes of vertebrates are:

Which class of animal is found only in water, has a changing body temperature, skin with scales, breathes through gills and lays eggs without a shell?

The only two montremes in the world are the:

The three types of mammals are:

Which class of animal has skin with scales, lays eggs with a leathery shell and does not maintain a constant body temperature?

Animals that have a backbone (vertebral column) are known as: