Backbone

Limbs

There are five groups of vertebrates

HOW DO YOU KNOW IT IS A FISH?

There are two kinds of fishes

Exemples of cartilaginous fish. are

HOW DO YOU KNOW IT IS AN AMPHIBIAN?

A pollywog is

In the adult stage an amphibian

THERE ARE TWO KINDS OF AMPHIBIANS:

It is a reptile because...

THERE ARE FOUR KINDS OF REPTILES:

It is a bird because...

It is a mammal because...

There are three different groups based on reproduction methods: