The first evidence that gibberellins are produced by plants was gathered in studies with dwarf mutant strains of corn. Treatment with gibberellins caused the dwarf plants to _______, while the normal, tall plants _______.

Question

Quizplus · Accepted Answer

The dwarf mutant strains of corn were treated with gibberellins and grew taller, indicating that gibberellins promote plant growth. The normal, tall plants were not affected by the treatment, indicating that they already had sufficient levels of gibberellins for normal growth. Therefore, the best answer is B, as the normal plants were virtually unaffected by treatment with gibberellins.

The First Evidence That Gibberellins Are Produced by Plants Was