Stem Anatomy · Botany

Which statement correctly describes a collateral vascular bundle in a stem?

  1. Xylem and phloem lie on the same radius, phloem outside
  2. Xylem and phloem alternate on different radii around the stem
  3. Xylem tissue completely surrounds the phloem tissue
  4. Phloem tissue completely surrounds the xylem tissue
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Correct answer: Xylem and phloem lie on the same radius, phloem outside

In collateral vascular bundles, xylem and phloem are positioned on the same radius. In many stems, phloem lies toward the outside and xylem toward the inside.

Difficulty: Medium Question 6 of 19

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