Wood Formation · Botany

Which of the following is responsible for the 'grained' appearance of wood when it is cut?

  1. The arrangement of xylem rays and annual rings
  2. The uneven thickness of the outer bark
  3. The presence of sieve tubes in the phloem tissue
  4. The density of the waxy outer cuticle
Show answer and explanation

Correct answer: The arrangement of xylem rays and annual rings

The wood grain is produced by the orientation and arrangement of longitudinal elements (tracheids, vessels, fibers) and radial elements (xylem rays) relative to the annual rings.

Difficulty: Medium Question 11 of 20

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