Question

1. Which of the following plant growth regulators is NOT produced commercially?

A. Abscisic acid
B. Ethylene
C. Auxins
D. Cytokinins

Answer 1

I'll look more into it, but it's either C or D

Step-by-step explanation:

Auxins: Auxin is a plant hormone produced in the stem tip that promotes cell elongation

Cytokinins: Cytokinins promote cell division. They are produced in growing areas, such as meristems at tip of the shoot. Zeatin is a hormone in this class, and occurs in corn (Zea ).