Virus

Replicate, divide, mutate, survive.

Tame? Beat. You hungry? Control tastes so sweet.
Species? Walk tall. Now show me the difference so small.

Kill, eat, exploit the weak.

It's freedom? That's choice. You listen because I hear no voice.
Tested, still lives? Now tell me the strong will survive.

Kill, eat, exploit the weak
(can't build a chain from missing links.)
kill, eat, exploit the weak.