Immediate Resposnse to Stimulus in Plants


 
 
Concept Explanation
 

Immediate Response to Stimulus in Plants

Like all other organisms plants also show response to changes occurring in environment. Plants respond to these changes or stimulus by showing different type of movements. These movements can be growth movements or nastic movements. Growth movements help the plant to grow whereas nastic movement do not perform any such kind of function. Nastic movements show immediate respond to a stimulus.

Immediate response to stimulus does not involve any growth, rather plant moves its leaves in response to touch. Sensitive plants give immediate response to the stimulus. Movement of part of plant occurs at a point different from the point of touch. Plant communicates the information that a touch has occurred. This is done in the following:

a)    Plants use electro-chemical means to convey the information from cell to cell as there are no specialized tissue for the conduction of information.

b)    Plant cells change their shape by changing the amount of water in them, resulting in either swelling or shrinking of cell and finally in shape.

                                         

Sample Questions
(More Questions for each concept available in Login)
Question : 1

Nastic movements are __________ plant movements that occur in response to environmental stimulus.

Right Option : B
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Explanation
Question : 2

Plants use __________________________ means to convey the information from cell to cell as there are no specialized tissue for the conduction of information.

Right Option : C
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Explanation
Question : 3

Photonasty is a type of nastic movement in response to 

Right Option : B
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Explanation
 
 
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