Plant Growth and Development Question 58
58. Abscisic acid causes
[1991]
(a) stomatal closure
(b) stem elongation
(c) leaf expansion
(d) root elongation
Show Answer
Answer : a
Hints & Solutions
(a) Abscisic acid is a stress hormone. During desication abscisic acid is synthesized which reduces transpiration by closure of stomata. It conserves water.