Why are vascular bundles in dicotyledonous stems referred to as open?

Why are vascular bundles in dicotyledonous stems referred to as open?
  1. Because they possess the ability to form secondary xylem and phloem tissues
  2. Because they have no cambium present in them
  3. Because they are jointly situated along the same radius of vascular bundles
  4. Because they are arranged in an alternate manner along the different radii

Solution

In dicotyledonous stems, cambium is present between phloem and xylem, and hence such vascular bundles possess the ability to form secondary xylem and phloem tissues, and are referred to as open.

Asked in: NCERT

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