Question

When the vascular cambium is present between the xylem and phloem, then the vascular bundle is called,

• A. Closed
• B. Exarch
• C. Open
• D. Endarch

Answer 1

The Correct Option is C

• Vascular bundles are arrangements of xylem and phloem tissues in plants that transport water, minerals, and food.
• Open vascular bundles are those where the vascular cambium is present between the xylem and phloem. The cambium enables the formation of secondary vascular tissue, allowing for the thickening of the plant stem or root.
• Closed vascular bundles lack a vascular cambium between the xylem and phloem, typically found in monocots where secondary growth is absent.
• Exarch and Endarch refer to the arrangement of xylem during the development of vascular tissues, but they are not directly related to the presence of vascular cambium in the bundle.

Thus, the correct answer is Open vascular bundle, where the vascular cambium is present between xylem and phloem.

The correct answer is (C) : Open.

Answer 2

The correct answer is: (C) Open.

The vascular cambium is a layer of undifferentiated cells responsible for secondary growth in plants, particularly in dicotyledons. When the vascular cambium is present between the xylem (which conducts water and minerals) and the phloem (which conducts food), it is capable of producing secondary xylem and secondary phloem.

A vascular bundle with a vascular cambium between the xylem and phloem is called an open vascular bundle. This is because the cambium allows for continuous growth and formation of new tissues, unlike a closed vascular bundle where the cambium is absent, and no secondary growth occurs.

In open vascular bundles, the cambium layer allows the plant to grow thicker and form more xylem and phloem tissue over time, enabling the plant to transport more water, nutrients, and food as it matures.