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