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Question
Which of the following is not a rhythmic phenomenon?
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Solution
The correct option is B Guttation
The movements showed by plants can be classified broadly as
(1) Hygroscopic- due to loss or gain of water and
(2) Vital- due to irritability of the cytoplasm.
Nyctinasty or sleep movements are rhythmic movements, also called as sleep movements and are caused by relative changes in cell size on the opposite sides of the leaf base called as pulvinus. Photonasty is the nastic movement caused in response to light. Guttation is the loss of water in solution through hydathodes. This is not an example of rhythmic movement and depends on environmental conditions. Thus, the correct answer is option B.
The movements showed by plants can be classified broadly as
(1) Hygroscopic- due to loss or gain of water and
(2) Vital- due to irritability of the cytoplasm.
Nyctinasty or sleep movements are rhythmic movements, also called as sleep movements and are caused by relative changes in cell size on the opposite sides of the leaf base called as pulvinus.
Photonasty is the nastic movement caused in response to light.
Guttation is the loss of water in solution through hydathodes. This is not an example of rhythmic movement and depends on environmental conditions. Thus, the correct answer is option B.
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