Practice question
Question
NPA inhibits auxin transport by blocking:
Explanation
Correct option is C, Auxin efflux. In Auxin Phytohormone problems like this, the accurate statement is Auxin efflux; the others are common mix-ups. Not these: A) Auxin synthesis; B) Auxin influx; D) Auxin degradation. Tissue transport questions usually turn on xylem vs phloem, living vs dead cells, or source vs sink.