That waste product would be carbon dioxide.
Explanation:
Cancer occurs in dividing cells only because genetic materials divide into two equal portions during division. This process may be interrupted by carcinogenes or mutagenes to make mutate cells and then render them as cancer cells. In the brain, the cells are differentiated and there is no chance to start division, then how can cancer be found in the brain.
I believe the answer might be A
Answer:
So they have it fresh in their minds on what happened, basically so they rember it more.
Explanation:
The 4th one. Maintaining body temperature and cooling down
