A biology student wanted to study how the amount of light affects the growth of aquatic plants over the course of a week. She set up two tanks with four plants in each. Both tanks were identical in every way except for the amount of light provided.
What is one thing the student could do to improve the accuracy of her results?
A: Grow the plants for a shorter length of time
B: Eliminate data that does not fit with her hypothesis
C: increase the size of both tanks
D: use a greater number of plants
1 answer
D.