Model systems were generalized from the study of simple and related animals to humans.

They are simple animals that live in burrows near rivers and streams.

In fact, the demons themselves are explained away as being simple animals.

It was almost more than a simple animal could .

His hunger demanded more, could not be defeated by the death of a simple animal.

The whole colony can move about as if it were a simple animal.

"What has an Adept to negotiate with a simple animal like me?"

Some simple animals can only tell light from dark, but with vertebrates, the visual system is able to form images.

In fact, if the population had been one of simple animals, they probably would have become a separate gene pool.

Certainly, the affairs of animals much simpler than people have been misinterpreted in the past.