Manya wanted to find out if plants absorb water through their roots, so she decided to conduct an experiment. Which of the following two set-ups should she choose to conduct a fair test?

Options

A. P and Q
B. Q and S
C. Q and R
D. None of these

Answer

A

Explanation

In the given experimental set-up, beakers R and S are without lid which may lead to evaporation as well as absorption of water. Plants of both these set-ups have attained different stages of their life cycle. So, absorption of water could be different according to their life stage. The plants chosen by Manya should be similar, i.e., one with roots and one without them.