ISA Certified Arborist Practice Exam

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What role does cellulose play in trees?

It helps in photosynthesis

It provides structural support in cell walls

Cellulose plays a crucial role in trees by providing structural support in cell walls. This polysaccharide is a major component of the plant cell wall and gives cells their rigidity and strength. The arrangement of cellulose fibers allows trees to maintain their structure, withstand various environmental stresses, and grow upward towards sunlight. This structural integrity is vital for the overall health and stability of the tree, allowing it to support its branches and leaves, which are important for photosynthesis.

While cellulose is not directly involved in photosynthesis, energy storage, or seed production, it is fundamental to the physical attributes of plants that enable these processes to occur efficiently. The other options do not accurately reflect the primary role of cellulose, though they have their own functions within the plant's biology.

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It stores energy

It aids in seed production

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