ANIMALS

1. Reptiles

1.1. produce eggs

1.2. vertebrae

1.3. scales

2. Insects

2.1. exoskeleton

2.2. antennas

2.3. head, thorax, abdomen

3. Fish

3.1. fins

3.2. breathe underwater

3.3. swim bladder

4. Mammals

4.1. warm blooded

4.2. have fur or hair

4.3. produce milk

5. Amphibians

5.1. cold blooded

5.2. complex life cycle

5.3. breathe through their skin

6. Birds

6.1. feathers

6.2. wings

6.3. have beaks or bills