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 quality is essential for photosynthesis to occur in leaves?

  1. High humidity

  2. Low temperature

  3. Regular watering

  4. Access to sunlight

The correct answer is: Access to sunlight

Sunlight is essential for photosynthesis to occur in leaves because it provides the energy needed for the process to take place. Humidity and temperature can affect the rate of photosynthesis, but they are not essential for it to occur. Regular watering is important for plant health, but it is not directly related to photosynthesis. Without access to sunlight, leaves cannot carry out photosynthesis and produce food for the plant. Therefore, access to sunlight is the most essential quality for photosynthesis to occur in leaves.

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