A control variable is the variable in the experiment that does not change.
Explanation:
If you are testing how seeds grow in different types of water, and you add 1tbps of salt to one pot of water with the plant, and then added 2tbps to another pot of water with the plant. The control variable in this experiment would be the water with no salt because it was not altered.
If mitotic cell division is the only way a particular species of a single celled organisms can reproduce it is most likely <u>that prokaryotic cell or the unicellular organism that also included the archea followed the process of mitotic division in order to survive and transmit the right amount genetic materials inside the different levels of generations.</u>
As, they were not complex in the cellular machinery which they had but rather went on for an alternative to save energy and reproduce the healthy form of there own species, having the right number of genetic material in them as well just like there parents had.
