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Abscisic acid regulates
  • a)
    Shoot elongation
  • b)
    Cell elongation and cell wall formation
  • c)
    Cell division
  • d)
    Leaf fall and dormancy
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
Abscisic acid regulatesa)Shoot elongationb)Cell elongation and cell w...
Abscisic acid  =
Before a leaf fall, a special zone of cells is formed at the base of the pedicel or petiole. This zone is called as abscission zone. It is delimited by a protection layer on the stem side and a separation layer on the organ side. The leaf is ultimately separated and the phenomenon is called abscission. ABA is also a growth inhibitor. It regulates the dormancy of seeds and buds perhaps by inhibiting the growth process. The ABA level decreases in the whole seed as their dormancy is broken.
option 
a
) to 
option 
c)
 = Are the functions done by Auxin. 

Abscisic acid a plant hormone that plays important role abscission of leaves. It inhibits stem elongation by inhibiting gibberellic acid. It prevents loss of dormancy in seeds. 
Thus, the correct answer is option D.
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Abscisic acid regulatesa)Shoot elongationb)Cell elongation and cell wall formationc)Cell divisiond)Leaf fall and dormancyCorrect answer is option 'D'. Can you explain this answer?
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