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Science · 2024 · 2 marks
CBSE 2024 · Region 1 · Set 3 · Q21
(A) (i) Write the significance of peripheral nervous system in human beings. (ii) How is human brain protected from mechanical injuries and shocks?
(A)(i)
Write the significance of peripheral nervous system in human beings.
(ii)
How is human brain protected from mechanical injuries and shocks?
OR
(B)
Name one directional growth movement each in response to chemicals and water in plants. Write an example for each of them.
Marking-scheme solution
(A)(i)
The communication between the central nervous system and the other parts of the body is facilitated by the peripheral nervous systems.
(ii)
protected in a bony box/skull//cranium/fluid filled balloon like structure which provides shock absorption.
OR
(B)
Chemotropism ; eg. growth of pollen tubes towards the ovules. Hydrotropism ; eg. growth of roots towards water.
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CBSE Class 10 Science past-paper question from the 2024 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.