Answer:
You use the control group against an experimental group to see if there is a change when you add a variable. Th control group is the group without the variable you are testing.
I think C, but I’m not sure.
The first one is A and the second one is probably A unless it could be D.. Not completely sure.
A cell wall is a rather stiff layer that surrounds a cell and offers additional support and protection outside of the plasma membrane. Bacteria, archaea, fungus, plants, and algae all contain them. Cell membranes do not surround cell walls in animals and most other protists.
