Heterotrophic organisms used the process of fermentation to nourish. what is fermentation?
it is a chemical process that requires oxygen.
it is a chemical process in which sugar molasses is ingested.
it is a chemical process which enables heterotrophs to obtain energy without oxygen.

Multicellular organisms use cell division, mitosis, for growth and the maintenance and repair of cells and tissues. single-celled organisms may use cell division as their method of reproduction. regardless of the reason for mitosis, the process ensures genetic continuity. what is the step in the cell cycle that ensure genetic continuity?