mammals, birds, reptiles, and invertebrates

What group has these characteristics in common, it has bones, it gives live birth, and it has hair or fur?

What group has these characteristics in common, it has no bones, it lays eggs, and has no feathers or scales?

What group has these characteristics in common, it has scales, it has bones, and lays eggs?

Unlock this slideshow and over 4 million more with Baamboozle+