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  4. Leaf fall can be prevented by

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Q. Leaf fall can be prevented by

NTA AbhyasNTA Abhyas 2022

Solution:

Cytokinin help in delaying senescence.
Cytokinins (CK) are a class of plant growth substances (phytohormones) that promote cell division, or cytokinesis, in plant roots and shoots. They are involved primarily in cell growth and differentiation, but also affect apical dominance, axillary bud growth, and leaf senescence.