NEET 2014 Biology question

Which one of the following growth regulators is known as 'stress hormone'?

(1)Abscisic acidCorrect
(2)Ethylene
(3)GA
(4)Indole acetic acid

Answer: (1)

Solution

Abscisic acid (ABA) is called the stress hormone because it is produced in response to stresses such as water deficit; it closes stomata, increases tolerance to stress, and promotes seed dormancy and

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Question ID VK-091587