Q22 of 26 Page 7

A) Which plant hormones is present in greater concentration in the areas of rapid cell division?
B) Give one example of a plant growth promoter and a plant growth inhibition. (CBSE 2012, 2011)

A) Cytokinin is present in greater concentration in the areas of rapid cell division.

B) An example of a plant growth promoter is gibberellins and an example of plant growth inhibition is abscisic acid. 

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How is the movement of leaves of the sensitive plant different from the movement of a shoot towards light? ( CBSE 2015)

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Name the horomone, which is secreted by the aderanl gland?How does this horomone help to deal with scary situation. (CBSE 2016)

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State the role of the brain in reflex action.  ( CBSE 2008)

 24

(a) i) Draw a neat diagram of human brain and ii) Label Medulla and Cerebellum iii) Write the functions of the above-mentioned parts (b) ”Both overproduction and underproduction of Growth hormone lead to disorders in the body.” Explain.
( CBSE 2017, 2015)