Evidence that gibberellins are produced by plants was gathered in studies with dwarf mutant strains of tomato.Work on dwarf peas produced the same results: treatment with gibberellins caused the dwarf plants to _______, while the normal, tall plants _______.
A) grow taller; also grew taller, but only slightly
B) grow taller; were virtually unaffected
C) stop growing immediately; stopped growing after a period of time
D) stop growing; were virtually unaffected
E) die; stopped growing

Question

Quizplus · Accepted Answer

Gibberellins are plant hormones that promote stem elongation. Dwarf mutant strains of plants, such as tomatoes and peas, when treated with gibberellins, grow taller. Normal, tall plants also respond to gibberellins but the effect is much less pronounced, hence they grow taller but only slightly.

Evidence That Gibberellins Are Produced by Plants Was Gathered in Studies