The other molecules are triglycerides, low density lipoprotein, and high density lipoprotein.
You didn't put any answers, but probably environmental groups.
The DNA has to replicate before mitosis to keep the number of chromosomes consistent. Hope this helps.
Answer:
The independent variable is "controlled" or held constant in the control group. A single experiment may include multiple experimental groups, which may all be compared against the control group. The purpose of having a control is to rule out other factors which may influence the results of an experiment.
Explanation: