The combustion of wood or coal leads to which of these environmental issues? a) radioactive waste b) large amounts of unused fuel c) just the emission of methane gas d) large amounts of ash and greenhouse gases

The answer is D I believe

Cell division is important to single celled organisms because it allows the cells to reproduce. through cell division, cells make exact copies of themselves. when single celled organisms go through cell division, they make exact copies of themselves which is how they reproduce.