Question

Close type of vascular bundle lacks?

• A. Xylem
• B. Sclerenchyma
• C. Phloem
• D. Cambium

Answer 1

The correct option is D

Cambium

The correct option is D.

Explanation of correct option :

Option D:

1. A vascular bundle is a part of the transport system of vascular plants.
2. The actual transport takes place in the stem, which comes in the xylem and phloem forms.
3. A vascular bundle, which also contains supporting and protecting tissues, contains both of these tissues.
4. Most vascular plants have a thin formative layer called the cambium between the xylem and phloem that produces new cells and promotes secondary growth.
5. In the closed type of vascular bundles, the xylem lacks cambium, and thus it is known as closed vascular bundles.

Explanation of incorrect options :

Option A :

1. The vascular tissue of plants called the xylem transports water and dissolved minerals from the roots to the rest of the plant while also offering structural support.
2. The tracheary components, a variety of specialized, water-conducting cells, make up xylem tissue.
3. Xylem can't be the correct option as in vascular bundles plants have xylem as well as phloems.
4. The actual transport takes place in the stem, which comes in the xylem and phloem forms.
5. A vascular bundle, which also contains supporting and protecting tissues, contains both of these tissues.

Option B :

1. One of the three types of ground, or foundational, tissue in plants is sclerenchyma; the other two types are collenchyma and parenchyma or live thin-walled tissue (living support tissue with irregular walls).
2. Sclerenchyma cells come in a wide range of sizes and forms, but there are primarily two types: sclereids and fibers.
3. The presence of Sclerenchyma doesn't matter with the closed type of vascular bundles.

Option C :

1. Phloem can't be the correct option as in vascular bundles plants have xylem as well as phloems.
2. All other parts of the plant are supplied with nutrients made during photosynthesis in the leaves through a type of vascular tissue called phloem.
3. Sieve elements, phloem fibers, and phloem parenchyma cells are a few of the different types of specialized cells that make up phloem.
4. A vascular bundle is a part of the transport system of vascular plants.
5. The actual transport takes place in the stem, which comes in the xylem and phloem forms.
6. A vascular bundle, which also contains supporting and protecting tissues, contains both of these tissues.

Final Answer: Close type of vascular bundle lacks cambium.