ISA Certified Arborist Practice Exam

Question: 1 / 400

What is the role of cations in a tree's ecosystem?

Regulating photosynthesis

Promoting root growth

Transporting sugars

Elements dissolved into water that become positively charged particles

The role of cations in a tree's ecosystem is to provide elements that are dissolved into water and become positively charged particles. Option A is incorrect because photosynthesis is not regulated by cations, but rather by the presence of sunlight. Option B is incorrect because while cations do play a role in root growth, it is not their main function in a tree's ecosystem. Option C is incorrect because while cations can help transport sugars, it is not their primary responsibility. Option D is the most accurate answer as it specifically mentions the role of cations in the ecosystem and how they can positively impact trees through the process of cation exchange. Thus, option D is the correct answer.

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