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The vascular bundles are closed when they
  • a)
    Lack pericycle
  • b)
    Have cambium
  • c)
    Lack cambium
  • d)
    Have pericycle
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
The vascular bundles are closed when theya)Lack pericycleb)Have cambiu...
In the monocotyledons, the vascular bundles have no cambium present in them. Hence, since they do not form secondary tissues they are referred to as closed.
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Most Upvoted Answer
The vascular bundles are closed when theya)Lack pericycleb)Have cambiu...
Explanation:

Vascular Bundles:
Vascular bundles are strands of vascular tissues (xylem and phloem) in plants that are responsible for the transport of water, minerals, and nutrients throughout the plant.

Closed Vascular Bundles:
Closed vascular bundles are those in which the vascular cambium is absent. The vascular cambium is a plant tissue that is responsible for the secondary growth of the plant, producing new xylem and phloem cells. In the absence of vascular cambium, the vascular bundles do not increase in diameter and remain closed.

Reason for Closed Vascular Bundles:
When vascular bundles lack cambium, they are unable to undergo secondary growth and increase in size. As a result, the vascular bundles remain closed and do not contribute to the growth of the plant in thickness.

Conclusion:
In conclusion, the vascular bundles are closed when they lack cambium. The presence of cambium is essential for the growth and expansion of vascular bundles in plants.
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