Certified Arborist Practice Exam

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Study for the Certified Arborist Exam. Utilize flashcards and multiple choice questions with hints and explanations for each question. Prepare confidently for your test!

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Put these tissues in the correct order from outside-in: Cambium, Xylem, Bark, Phloem

  1. Phloem, Cambium, Xylem, Bark

  2. Cambium, Xylem, Phloem, Bark

  3. Bark, Phloem, Cambium, Xylem

  4. Xylem, Phloem, Bark, Cambium

The correct answer is: Bark, Phloem, Cambium, Xylem

The correct order of the tissues from the outside to the inside is Bark, Phloem, Cambium, and Xylem. Bark is the outermost layer of a tree, protecting it from environmental stresses and pathogens. Beneath the bark lies the phloem, which is responsible for transporting nutrients, particularly the products of photosynthesis, throughout the plant. The cambium is a thin layer of actively dividing cells that produce new phloem and xylem. Finally, xylem is located inside the cambium and is responsible for the transport of water and minerals from the roots to the leaves while also providing structural support. This sequence is critical for understanding tree anatomy and the functions of each layer, making option C the correct choice. The arrangement indicates the flow of nutrients and water through the plant and the layers' protective roles, which can be essential information for someone studying arboriculture.

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