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    Plant Growth and Development
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    Which phenomenon is introduced by auxin ?
    Apical Dominance
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    Name an antisenescence hormone.
     Cytokinin.
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    Name the hormone which enhances the rate of respiration during the ripening of fruit.

    Ethylene.
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    Who discovered gibberellin ?

    E.Kurosawa.
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    A student cultures a callus from the tabacco pith in a sterilized minimal nutritive medium but adds more cytokinins than auxins, what would develop first from the callus shoot buds or the roots ?
    Shoot buds.
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