Choose the correct statement.
Auxins are strongly acidic growth hormones
Auxins have a saturated ring structure
Auxin application can retard cell elongation
Indole 3-acetic acid (IAA) is the universal natural auxin
Auxins are weakly acidic growth hormones having an unsaturated ring structure and capable of promoting cell elongation. Indole 3-acetic acid (IAA) is the universal natural auxin. It was discovered by Kogl et al.