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प्रश्न
Which of the following is the only gaseous plant growth regulator?
पर्याय
ABA
Cytokinin
Ethylene
Gibberellin
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उत्तर
Ethylene
Explanation:
It is the only gaseous growth regulator. Denny (1924) reported ethylene is effective in fruit ripening. Gane (1934) established that plants naturally synthesize ethylene.
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