Because warm air rises up so it's warmer on the top floor.
Cancer cells reproduce the same way the other cells reproduce. The difference between cancer cells and others is that their reproduction is uncontrollable. They constantly go through the cell cycle and they reproduce. Two ways cell reproductions are meiosis and mitosis. DNA duplicates itself. Cancer is incessantly receiving messages.
C X-inactivation "switches off" one of the X chromosomes.
Explanation:
The correct answer would be “All of the Above”
Reducing the Chemicals dumped into wastewater
