During autumn, a boy notices that road is littered with orange leaves He looks up to find that the tree is devoid of most leaves, while some of them are still falling . The phytohormone responsible for this causes ………….
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Answer:
ethylene
Explanation:
Ethylene. Ethylene is unique in that it is found only in the gaseous form. It induces ripening, causes leaves to droop (epinasty) and drop (abscission), and promotes senescence.
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