What phenotype would you expect for a root in which the root cap became well coupled to the xylem? This phenotype would mimic a loss of function mutation in the synthesis of what hormone?

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If the root cap became well coupled to the xylem, it would mimic a loss of function mutation in ethylene synthesis. This would result in elongated roots, as ethylene normally plays a role in inhibiting root elongation.

What Phenotype Would You Expect for a Root in Which