ISA Certified Arborist Practice Exam

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Prepare for the ISA Certified Arborist Exam by testing your knowledge with comprehensive questions and detailed explanations. Enhance your skills and understanding of tree care, management, and environmental practices.

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In which part of a tree do we find stomata?

Roots
Branches
Trunk
Leaves

The correct answer is: Leaves

Stomata are small pores found on the leaves of a tree. They are responsible for gas exchange, allowing the tree to take in carbon dioxide for photosynthesis and release oxygen and water vapor. Stomata play a crucial role in regulating the tree's transpiration, which is the process of water loss through the leaves. Therefore, the correct answer is D, Leaves. Stomata are not typically found in the roots, branches, or trunk of a tree. While all parts of a tree are important for various functions, stomata specifically serve their purpose on the leaves.