Plants have neither a nervous system nor muscles, even then they

Plants have neither a nervous system nor muscles, even then they respond to stimuli. For example, the leaves of chhui-mui (touch-me-not) plant when touched begin to fold up and droop.

1. How is the information communicated in ‘‘touch-me-not’’ plants ?
2. What enables the plant cells to bring out the observable response ?
3. Differentiate the movement mentioned above from the movement of tendrils in a pea plant.

• Answer:
  1. Plant cells use electrical– chemical means to convey information. /The information that touch has occurred must be communicated
  2. Plant cells change shape by changing the amount of water in them (swelling or shrinking).

       c. 

  

• Exam Year: 2025