ISA Certified Arborist Practice Exam

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Study for the ISA Certified Arborist Exam. Prepare with flashcards, multiple choice questions, and comprehensive hints and explanations. Get ready to ace your exam!

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Which of the following represents excurrent tree growth?

  1. Linear and continuous growth

  2. Concentric rings

  3. Branches on a single plane

  4. Branches on multiple planes

The correct answer is: Linear and continuous growth

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.

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