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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.
Define reflex action. With the help of a flow chart show the path of a reflex action such as sneezing.
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.
The correct sequence of events occurring when we touch a hot object unconsciously :
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