Classifying animals 4

4- Fish, amphibians, reptiles and birds lay eggs, but cannot feed milk.

Does it lay its eggs in water?

Yes, it does. Then it is either a fish or an amphibian. Fish and amphibians have to lay their eggs in water because they are not water-thigh (impermeable) and they can dry.

Go to 5.

No, it doesn’t. Then it is either a bird or a reptile. Birds and reptiles descend from dinosaurs and they both can lay their eggs in land because they are water-thigh.

Go to 6.