How can plants manage wastes even though they do not have special excretory organs like kidneys?

Correct answer: They can store some wastes in old leaves, bark, resins or gums; wastes may be removed when these parts are shed.

Plants can store some wastes in leaves, bark, resins or gums. When leaves or other old parts are shed, some of the stored wastes are removed with them. Plants also use other routes, such as diffusion, to dispose of some wastes.