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.
[ Lyrics from: http://www.lyricsfreak.com/p/pitchshifter/virus_20108883.html ]