Which one of the following growth regulators is known as ‘stress hormone’?
(a) Abscisic acid
(d) Indole acetic acid
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Ans : (a) Abscisic acid
Abscisic acid prepares plants to cope with stress conditions like drought etc. by inducing stomatal closure and other reactions. Hence it is named stress hormone.
In which one of the following processes CO2 is not released? (a) Aerobic respiration in plants (b) Aerobic respiration in animals (c) Alcoholic fermentation (d) Lactate fermentation