Question

Endodermis of dicot stem is also known as

• A. Starch sheath
• B. Bundle sheath
• C. Water channel
• D. Mesophyll

Answer 1

The correct option is A

Starch sheath

The correct option is A.

The explanation for the correct option:

Starch sheath:

1. In comparison to monocot plants, dicot plants have a more complicated vascular system. The pith of the dicot stem is surrounded by a ring of vascular bundles.
2. A vascular cambium separates the phloem and xylem. The vascular bundle is endarch, conjoint, open, and collateral.
3. The major dicot stem of plants consists of the pith or medulla, medullary/pith rays, pericycle, vascular threads, hypodermis, cortex, endodermis, and epidermis.
4. Because the endodermal cells contain a noticeable food reserve that resembles starch grains, the stem endodermis is sometimes known as a starch sheath
5. A single cell layer that is present at the cortex's edge and has barrel-shaped cells that do not surround defines the thickness of an endodermis. The dicot stem's endodermis is also known as the starch sheath because it is made of starch grains.

Explanation for incorrect options:

For option B

Bundle sheath:

1. Bundle sheath are a group of sheath that controls the transport of material inside the parenchyma and vascular tissue while also protecting the vascular tissue from exposure to the air in plants.
2. This occurs as a result of the vascular bundle in plants being covered by an area or layer of densely packed cells.

For option C

Water channel:

1. Aquaporin proteins are composed of amino & carboxyl at their end faces inside the cell and are embedded in the cell membrane as a bundle of six transmembrane a-helices.
2. It is often referred to as "water channels" because it is a protein channel of an important intrinsic protein that helps transport water between biological cells by forming the pores of a membrane inside a cell.

For option D

Mesophyll:

1. Mesophyll, sometimes referred to as chlorenchyma cells, is a type of tissue that develops from photosynthetic (parenchyma) cells and is found inside the leaves.
2. Chloroplasts and large, densely vacuolated cells make up the majority of mesophyll.
3. This tissue also includes palisade parenchyma and spongy mesophyll.
4. The interior ground tissue called mesophyll is found between the two epidermal cell layers of a leaf.

Final Answer: Endodermis of Dicot stem is also known as starch sheath.