Practice question
Question
Which phytohormone signaling pathways are evolutionarily related to bacterial two‑component systems?
Explanation
Cytokinin and ethylene (A) is correct here. This is core Phytohormone ALL: once you know the definition or pathway step, Cytokinin and ethylene is the clear fit. The wrong ones are B) Auxin and gibberellin; C) Brassinosteroid and auxin; D) Auxin and cytokinin. If the topic is about gradients or potentials, water/solutes move from higher to lower of the relevant quantity.
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