The hormone responsible for senescence:
1.  ABA
2.  Auxin
3.  GA
4.  Cytokinin

Subtopic:  Abscisic Acid |
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Seed dormancy is due to: 
1. Ethylene
2. Abscisic acid
3. IAA
4. Starch

Subtopic:  Abscisic Acid |
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