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Movement of stomatal opening and closing and opening of Oxalis flower share

Movement of stomatal opening and closing and opening of Oxalis flower share the common feature that both are

Options

(a) photonastic
(b) thigmonastic
(c) seismonastic
(d) thermonastic

Correct Answer:

photonastic

Explanation:

Photonastic movement is a nastic movement (due to external stimuli) in response to change in light intensity, e.g. Stomatal opening and closing, the opening and closing of flowers.

ML1998
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