Which hormone helps close leaf pores during wilting in plants?
Answer and explanation
Correct answer: Abscisic acid
During wilting or water stress, a plant must reduce the loss of water through transpiration. Abscisic acid, commonly called ABA, signals the guard cells around stomata to close them. This conserves water in the plant. Insulin, adrenaline, and thyroxine are animal hormones and do not regulate stomatal closure. Hence, option A is correct.
Frequently asked questions
What is the correct answer to this question?
Abscisic acid
Why is this the correct answer?
During wilting or water stress, a plant must reduce the loss of water through transpiration. Abscisic acid, commonly called ABA, signals the guard cells around stomata to close them. This conserves water in the plant. Insulin, adrenaline, and thyroxine are animal hormones and do not regulate stomatal closure. Hence, option A is correct.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Control and Coordination. Topic: Plant hormones.
