| I. In dry atmosphere, the relative humidity is low so, the rate of transpiration increases. |
| II. Slow breeze promotes the rate of transpiration. |
| III. ABA promotes transpiration. |
| IV. A high salt concentration in soil water increases transpiration. |
A) I and II
B) II and III
C) III and IV
D) I and IV
Correct Answer: C
Solution :
Statement III and IV are incorrect as Abscisic Acid (ABA) inhibits transpiration. This hormone functions in various plant developmental processes, including bud dormancy and ABA-mediated signaling also plays an important part in plant responses to environmental stress and plant pathogens. A high salt concentration in soil reduces the rate of transpiration due to less, waiter absorption.
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