Plant
Rajesh designed an experiment to test the effect
of fertilizer on plant growth. The table on the right
shows the data he collected. Which changes
should Rajesh make to his experiment to improve
the validity of the data? Check all that apply.
0 Add twice as much fertilizer to the plants.
Measure the growth of a plant that did not
receive fertilizer.
Perform additional trials.
Remove plant 2.
DONA