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Why can abscisic acid be called a stress hormone?

Answer and explanation

Correct answer: Because it helps close leaf stomata during water shortage

The governing concept is hormonal response to environmental stress. During water shortage, abscisic acid promotes stomatal closure, reducing transpiration and helping the plant conserve water. This protective action explains why it is called a stress hormone, so option A is correct. The other choices describe unrelated animal functions and do not represent the role of abscisic acid in plants.

Related tags

Abscisic AcidStomataPlant StressPlant HormonesControl And CoordinationScienceClass 10 Mcq

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