D Pastureland - Grazing Livestock
Cell-tissue-organ-organ system-organism
Lots of options on what to eat
Lots of ways to get energy
Lots of ways to be resourceful.
<span>Proto-oncogenes are genes that normally help cells grow. When a proto-oncogenemutates (changes) or there are too many copies of it, it becomes a "bad" gene thatcan become permanently turned on or activated when it is not supposed to be. When this happens, the cell grows out of control, which can lead to cancer.....Is this what you need ?</span>