For example, scientists had predicted that more primitive animals such as fish would be missing certain blood-clotting proteins.

The plants in particular had undergone a transformation that made them act like primitive animals.

"To be honest, most of them saw you at first as some kind of grinning primitive animal."

Or take some of the more primitive animals, On Earth, cut an arm off a starfish and it will grow a new one.

The brain's surface is fairly smooth, typical for a "primitive" animal.

"When primitive one-celled animals first began to cooperate," he said to the Master, "they did not at once form a man."

Thus many primitive animals retain an ancient form and subsist to the present day.

In an interview, he said these primitive animals could well have evolved long before Archaeopteryx.

We're right back for practical purposes a hundred million years ago, meeting like two primitive, different animals on a hillside!

Humanity is seen by them as nothing more than pathetic, primitive animals.