Question

What is Photonastic movement?​

Answer 1

Answer:

Opening of flowers during day and closing at night is called Photonastic movement. This does not causes growth.

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Answer 2

Answer:

the tendency in certain plant species to respond to light by developing sufficient cellular force or growth on one side of an axis to change the form or position of the axis, as in the opening and closing of the flowers of four-o'clocks. Cf. thermonasty. — photonastic

Explanation: