Q34 - Chloride-Induced Trichome Induction and Ion Exclusion
The relationship between trichome density on leaves and ion uptake was plotted from a bromeliad plants treated with different concentrations of chloride during 1 week.
Figure 1.
Using the information and data, determine which of the statements are true or which are false.
A. The results suggest that chloride is only absorbed by bromeliad trichoms.
B. Induction of trichomes occurs at any increase in concentration of exogenously applied chloride.
C. There is an exponential relationship between the chloride concentration and absorbed chloride by leaf trichomes.
D. Chloride is actively excluded or secreted above 40 uM concentration.
Question reproduced from IBO 2018, Theoretical Paper 2, licensed under CC BY-NC-SA 4.0 - attributed to the International Biology Olympiad. Open the full exam PDF · Community solutions (unofficial)