Practice question
Question
The most abundant natural auxin in plants is:
Explanation
IAA (A) is correct here. This is core Auxin Phytohormone: once you know the definition or pathway step, IAA is the clear fit. The wrong ones are B) IBA; C) NAA; D) 2,4-D. If the topic is about gradients or potentials, water/solutes move from higher to lower of the relevant quantity.
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