A student designed an experiment to test the environmental preferences of pill bugs (roly-polies). The student wanted to test if pill bugs prefer a salty environment or not. To perform this
experiment he lined the bottom of one side of a choice chamber with a paper towel soaked in 1%
salt solution, and on the other side of the choice chamber he lined the bottom with a paper towel
soaked in 0% salt water. He then placed 5 pill bugs on either side of the choice chamber and
recorded the number of pill bugs on either side of the chamber every minute for 10 minutes.
What is the control group in the experiment described above?
✓
с
d
there is no control
group
both side of the
choice chamber act
as control groups
the side of the
chamber soaked in
1% salt solution
the side of the
chamber soaked in
0% salt solution