ISA Certified Arborist Practice Exam

The correct answer is C. Evergreen. Evergreen trees and plants are characterized by retaining their leaves throughout the seasons, as opposed to deciduous trees that shed their leaves annually. A. Mycorrhizae is a symbiotic association between a fungus and the roots of a vascular plant. B. Leaching is the process where water soluble nutrients are washed out from the soil. D. Chlorosis refers to the condition of yellowing of plant tissue, usually due to a nutrient deficiency.