ISA Certified Arborist Practice Exam 2025 – All-in-One Resource for Comprehensive Exam Success!

Excurrent tree growth is characterized by a single, dominant leader that extends the length of the trunk. This results in linear and continuous growth upwards, giving the tree a more conical or pyramidal shape. This growth pattern is common in species like pines and firs. In contrast, trees with decurrent growth have multiple leaders or branches that grow outward in various directions. Option A correctly represents excurrent tree growth with its description of linear and continuous growth. Options B, C, and D are more indicative of decurrent growth patterns.