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The type of chemical influencing cell division and elongation:
Question 8 options:

cytokinins

gibberellins

ethylene

auxins

Respuesta :

ramsha1
Auxin. 
Auxin is a plant hormone produced in the stem tip that promotes cell elongation. Auxin moves to the darker side of the plant, causing the cells there to grow larger than corresponding cells on the lighter side of the plant.

source: https://www2.estrellamountain.edu/faculty/farabee/biobk/BioBookPLANTHORM.html