How are all living things similar and yet how are they different?

Well, all living things are living, and they all know what they have to do. They were all created the same way, and live toghether, except where they really are. They are diffrent because of they way they act. Some animals are mean and nasty, while others are just hope to stay alive another day. Some are smart, and others dumb. You asked a hard question. I'm only trying to give a answer that makes the most sense