Plant Tissues · Botany

In monocot stems, the vascular bundles are described as 'closed' because they lack:

  1. Xylem
  2. Phloem
  3. Cambium
  4. Sieve tubes
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Correct answer: Cambium

Closed vascular bundles lack a cambium layer between the xylem and phloem. This means monocot stems generally do not undergo typical secondary growth (thickening).

Difficulty: Medium Question 34 of 40

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