If you placed an auxin-containing agar block off-center on the cut top surface of a sunflower seedling, you would expect, after a day, to find that the sunflower had

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Auxins are plant hormones that promote cell elongation. When placed off-center, they cause the cells on one side of the plant to elongate more than those on the opposite side, resulting in the plant bending away from the side with the higher concentration of auxin.

If You Placed an Auxin-Containing Agar Block Off-Center on the Cut