As the soil dries out during a time of water stress, roots send _______, a hormonal signal, to the stomates, which decreases the extent of their opening and thus decreases water loss.
A) osmotic acid
B) cyclic AMP
C) glycerol
D) abscisic acid

Question

Quizplus · Accepted Answer

Abscisic acid is a plant hormone that is produced in response to water stress and signals stomatal closure to reduce water loss.

As the Soil Dries Out During a Time of Water