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प्रश्न
List two differences between the movement of leaves of a sensitive plant and the movement of a shoot towards light.
उत्तर
| Movement of leaves of a sensitive plant | Movement of a shoot towards light |
| A nastic movement is the name for the kind of movement that sensitive plant leaves exhibit. They occur instantly in reaction to a touch stimulation (thigmotropism). | Tropic movement describes a shoot's movement in the direction of light. A lengthier amount of time passes during it. |
| The direction of the stimulus has no bearing on this kind of movement. | Phototropism is the name for this movement, which is dependent on the direction of the light. Movement of this kind is growth-oriented and directional. |
संबंधित प्रश्न
Give the scientific terms used to represent the Bending of roots towards water.
Name the plant organ which is positively hydrotropic.
Define hydrotropism. Give one example of hydrotropism. State whether this example is of positive hydrotropism or negative hydrotropism. Illustrate your answer with the help of labelled diagram.
The growth of a pollen tube towards the ovule caused by a sugary substance as stimulus is an example of :
(a) phototropism
(b) chlorotropism
(c) gravitropism
(d) chemotropism
There are three plants A, B and C. The flowers of plant A open their petals in bright light during the day but close them when it gets dark at night. On the other hand, the flowers of plant B open their petals at night but close them during the day when there is bright light. The leaves of plant C fold up and droop when touched with fingers or any other solid object.
- Name the phenomenon shown by the flowers of (i) plant A and (ii) plant B.
- Name one flower each which behaves like the flower of (i) plant A and (ii) plant B.
- Name the phenomenon exhibited by the leaves of plant C.
- Name a plant whose leaves behave like those of plant C.
- Which plant/plants exhibit the phenomenon based on growth movements?
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.
state two ways in which the above two processes differ.
Differentiate between:
Thigmotropism and geotropism
The shoot system grows upward in response to ______.
State whether true or false. If false, correct the statement.
The response of a part of plant to the chemical stimulus is called phototropism.
______ flowers bloom as the temperature increases.
