Complete question:
The movement of auxin from the apical to basal sides of immature leaf cells and toward the xylem and phloem of the stem is an example of _____ transport.
polar
trophic
paraxial
bidirectional
Answer:
Polar
Step-by-step explanation:
Auxin is one of several plant hormones. It is a group of several natural and synthesized plant hormones. Auxin is mainly produced in the apical meristem of the shoot. The synthesized auxin in shoot meristem moves downwards along the axis of shoot and root. Since this movement occurs in one direction only, it is also called unidirectional or polar movement. It is always transported downwards. Auxins are also produced in young leaves and seeds.