Mammals are covered with...

• scales
• fur or hair
• smooth, moist skin
• feathers

Birds are covered with...

• feathers
• scales
• moist skin

Mammals breathe with...

• lungs
• gills
• lungs and gills
• lungs, gills, and skin

Birds breathe with...

• gills
• gills and lungs
• lungs
• gills, lungs, and skin

Birds...

• have live young
• live young and lay eggs
• lay eggs

Fish are covered with...

• scales
• scales and skin
• fur or hair

Most fish breathe with...

• lungs
• gills

How do fish give birth?

• Most lay eggs
• Live birth only.

Reptiles are covered with...

• smooth, moist skin
• fur or hair
• feathers
• scales or shells

Reptiles breathe with....

• gills
• gills and lungs
• lungs
• lungs, gills, and skin