申論題

ln the questions below, "insensitive" means the mutant shows a weaker response than wild type (WT) at the same hormone dose (i.e., root growth is less inhibited and remains higher than WT). In contrast, "hypersensitive" means the mutant shows a Root growth (96) 0-cra1-1 -Columbi 20cre1-2 8ux1-7 1 10 100 1,000 IAA (ng mi-y Root growth (%) --cre?-1 -Columbia cre1-2 -ab/3-1 10 100 100 100 1,000 10,000 ABA (ng mlstronger response than WT (i.e., root growth is more strongly inhibited and becomes lower than WT). If the mutant doseresponse curve largely overlaps with WT across concentrations, describe it as "no major change.

[2 pt] 21. Based on panel (b), compared to WT, cre1 mutants are to AC((C) (insensitive | hypersensitive | no major change)