Answer:
A. A eukaryote cell
Explanation:
because eukaryotic cell is a cell which have a membrane - bounded nucleus
Answer:
they need to be able to maintain their salt content, thru osmoregulation
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: