ISA Certified Arborist Practice Exam

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What is the primary function of compartmentalization in trees?

  1. Storing nutrients

  2. Enhancing growth

  3. Transporting water

  4. Wall off decay in wood

The correct answer is: Wall off decay in wood

Compartmentalization in trees is a natural defense mechanism that isolates and walls off areas of decay and damage to prevent the spread of pathogens and decay agents throughout the tree. This process helps trees to limit the damage caused by diseases, insects, or injuries, ultimately promoting the tree's long-term health and survival. Therefore, the primary function of compartmentalization in trees is to wall off decay in wood. While storing nutrients, enhancing growth, and transporting water are essential functions in trees, compartmentalization specifically relates to the containment and isolation of damage within the tree to prevent further harm.

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