Evaluate the following statement: Concentrations of trace elements in an environment above what is required by organisms generally has no effect on those organisms?
1) False. Elevated concentrations of trace elements such as chromium and phosphorus can be toxic.
2) True. Only trace element limitation can lead to disease among organisms.
3) False. Increasing the concentration of trace elements above what is required generally has a beneficial effect on organisms.
4) False. Elevated concentrations of some trace elements such as cobalt and chromium can be toxic.
5) True. Most organisms have evolved adaptations that allow them to tolerate very high concentrations of trace elements in the environment.