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What are plant hormones? Name the plant ...

What are plant hormones? Name the plant hormones responsible for the following:
`{:("(i) Growth of stem " ," (ii) Promotion of cell division"),("(iii) Inhibition of growth"," (iv) Elongation of cells"):}`

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Plant hormones : Chemical substances which help the plant to coordinate growth and development :
(i) Auxins/ Gibberellins
(ii) Cytokinins
(iii) Abscisic acid / ABA
(iv) Auxins/ Gibberellins
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Knowledge Check

  • Name of the plant hormones which are responsible for the following effects:

    A
    falling of leaves
    B
    opening of stomata
    C
    bending to stem towards light
    D
    closing of stomata

  • The plant hormone essential for cell division is

    A
    abscisic acid
    B
    auxin
    C
    gibberellin
    D
    cytokinin

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