Multiple choice

The vascular bundle with a cambium is called:

  1. closed

  2. open

  3. exarch

  4. endarch

  5. none of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Open vascular bundles contain cambium between xylem and phloem, allowing secondary growth. Closed bundles lack cambium and cannot undergo secondary thickening. Exarch and endarch refer to xylem maturation patterns, not cambium presence.

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