Name the three inhibitors which were chemically identical and na
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    Plant Growth and Development

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    51. Which is the commercial source of ethylene ?
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    52. Give one antagonistic effect of cytokinin and gibberellin. 
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    53. What is uniqueness in ethylene among phytohormones ?
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    54. Which hormone speeds up malting process in brewing industry?
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    55. Name the three inhibitors which were chemically identical and named abscisic acid.

    The three inhibitors which were chemically identical are - inhibitor-B, abscission II and dormin. these were named abscisic acid (ABA).
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    56. Why the terrestial plants cannot germinate under water ?
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    57. How cytokinins delay leaf senescence ?
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    58. What happens in In arithmetic growth In arithmetic cell division In arithmetic growth?
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    59. Name the simple gaseous hormone 
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    60. Where ethylene is synthesised ?
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