Question
Question: Cortex is the region found between A. Endodermis and pith B. Endodermis and vascular bundle C....
Cortex is the region found between
A. Endodermis and pith
B. Endodermis and vascular bundle
C. Epidermis and stele
D. Pericycle and endodermis
Solution
The plants tissues are arranged in different layers. The cells are arranged in groups and bundles and are designated to perform different types of functions. The outer layer of the cells is related to the protection of the inner layer while the conducting tissues are associated with transportation of different types of materials.
Complete answer:
Cortex are groups of tissues formed by unspecialized cells. The cells that form the cortex are known as the cortical cells. These cells are present in between the surface cells and the stele of the stems and the roots. The surface cells are known as the epidermis. The stele is the central part of the roots and contains tissues that are derived from the procambium. The stele is considered as the central core of the vascular tissues.
The conducting tissues are the important transportation tissues that help in the transportation of the different materials such as organic compounds and water etc. to different parts of the plant. The conducting tissues of the plants are the xylem and phloem.
The cortical layer of the cells contains carbohydrates or several other substances such as resins, latex, essential oils and tannins. In some plants such as the herbaceous stems but not in the woody stems, the innermost layer of the cortical cells is further differentiated into a distinct layer of cells which is known as the endodermis.
The pericycle is a group of parenchymatous tissues or sclerenchyma cells. It is present just inside the endodermis and forms the outermost part of the stele of the plants. It is composed of non-vascular parenchyma cells. It is considered as the part of the vascular cylinder as it arises from the procambium.
Pith is known as the medulla of the plants. It is a tissue present in the stems of the vascular plants. IT is made up of soft and spongy parenchyma cells. It is found in the younger plants but in older plants it is replaced by the xylem layer.
Hence, the correct answer is option (C).
Note: Cortex is the layer of cells that are present in the outer surface of a stem or roots. They are present in between the epidermis and stele layer of the plants. It functions as a transportation medium for the movement of materials through diffusion. It also serves as the storage of food materials in the form of starch and other materials such as resins, oils etc.