Question

Opening and closing of stomata during day and night is an example of?

Answer 1

Opening and closing of stomata during day and night is an example of sleeping or seismonastic movements.

Explanation:

Stomata open during day time and close at night in most of the plants. These movements are called sleeping or seismonastic movements, because these are linked with diurnal changes in day and night.

The opening and closing of stomata occurs due to changes in the turgidity of kidney-shaped guard cells surrounding stomatal opening.

During day time guard cells become turgid, stomata open. At night guard cells become flacid , the stomata close.

These movements are also cited as an example of turgor movements, because the opening and closing of stomata are brought about due to changes in the turgidity of guard cells.