Loading...
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.
Write the significance of peripheral nervous system in human beings.
How is human brain protected from mechanical injuries and shocks ?
Name one directional growth movement each in response to chemicals and water in plants. Write an example for each of them.
Sense organ in which olfactory receptors are present is :
Define a reflex arc. Why have reflex arcs evolved in animals ? Trace the sequence of events which occur, when you suddenly touch a hot object.
© 2026 PadhAiPro. This question is provided for educational purposes.