What happens to a cell in a hypertonic solution?

Aplant may open end close its stomata to prevent excess water loss and maintain

The third stage of cellular respiration is (2 points)

Ascience research group is testing a new type of plant food. one trial is conducted in a controlled experiment. the data from the trial show that the plant that received the new food grew faster than the control plant. the group announces that the new plant food makes plants grow faster. what is the main weakness in this scientific claim?