When the leaves of a sensitive plant are touched with a finger, they fold up and when light fades at dusk, the petals of a dandelion flower close.
(a) State one way in which the above two processes are similar.
(b) State two ways in which the above two processes differ.
Answers
(a) The procedures are identical, since the stimulus path does not decide the response.
(b) The first cycle in which the leaf folds is thigmonastic and the stimulation is touch.
Explanation:
When a sensitive plant's leaves are touched with a finger, they fold up and, at dusk, the petals of a dandelion flower close as light fades.
(a) Both the procedures are identical, since the stimulus path does not decide the response. They're movement nastic.
(b) The first cycle in which the leaf folds is thigmonastic and the stimulation is touch. The second cycle of petal closure is photonastic, and the stimulation is light.
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Why is folding of leaves of touching sensitive plant with finger not a tropism?
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What will happen when the leaf of sensitive plant is touch explain?
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Answer:
@ both of these are are non directional movement therefore both are nastic movements
B) first the stimulus is touch and it is thigmonastic and second stimulus is light and it is photonastic