In a woody eudicot, which of the following indicates the correct ordering of plant tissues, from the outside of the stem to the inside?

General
1

in a woody eudicot, which of the following indicates the correct ordering of plant tissues, from the outside of the stem to the inside?

2

In a woody eudicot, what indicates the correct ordering of plant tissues from the outside of the stem to the inside?

Answer:
In a woody eudicot stem, the plant tissues are arranged in concentric rings from the outside to the inside. The correct ordering of plant tissues in a woody eudicot stem, starting from the outermost layer, includes the following layers:

  1. Epidermis: This is the outermost layer of the stem and serves as a protective covering for the plant. It helps in preventing water loss and offers protection against pathogens.

  2. Cork Cambium (Phellogen): The next layer is the cork cambium, which is responsible for the production of cork cells towards the outside. Cork cells provide further protection and waterproofing of the stem.

  3. Cork (Phelloderm): Inside the cork cambium lies the cork (phelloderm) tissue. Cork cells are dead at maturity and contain suberin, which makes them impermeable to gases and water.

  4. Secondary Phloem: Further towards the center, you will find the secondary phloem, which is responsible for transporting organic nutrients, such as sugars, throughout the plant. It is a living tissue composed of sieve elements, companion cells, fibers, and parenchyma cells.

  5. Vascular Cambium: The vascular cambium is a meristematic tissue layer that gives rise to secondary xylem (wood) towards the inside and secondary phloem towards the outside. It is responsible for the secondary growth of the stem.

  6. Secondary Xylem (Wood): Towards the center of the stem, you will find the secondary xylem, also known as wood. It is composed of tracheids, vessels, fibers, and parenchyma cells. Xylem is responsible for water and mineral transport and provides structural support to the plant.

  7. Pith: In the very center of the stem lies the pith, which is a ground tissue composed of parenchyma cells. The pith may store nutrients and provides additional support to the stem.

Understanding the ordering of these plant tissues in a woody eudicot stem is essential for comprehending the structure and functions of these tissues in plants.