Question

What are meristematic tissues ?classify those on the basis of their position.​

Answer 1

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There are some specialized cells in plants that are not differentiated and help in the growth of the plants. These cells in a plant can be young and have the ability to divide continuously. There is a special name for these cells, which are called the meristem cells. The tissue that these meristem cells form in plants is called as the meristematic tissue.

On the basis of their position in the plant body meristems are classified into three categories :

(1) Apical Meristem : This meristem is located at the growing apices of main and lateral shoots and roots.

(2) Lateral Meristem : These meristems occur laterally in the axis, parallel to the sides of stems and roots.

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Answer 2

Answer:

• The meristem is a type of tissue found in plants. It consists of undifferentiated cells capable of cell division. Cells in the meristem can develop into all the other tissues and organs that occur in plants. Differentiated plant cells generally cannot divide or produce cells of a different type.

Types of Meristematic Tissue

Depending on the occurrence of the meristematic tissue on the plant body, we can classify the meristems into three types. They are:

• Apical Meristems

These meristems are located on the tip of the root, stem etc. They help in the growth of the root system as well as the shoot system. The various cell divisions along with the cellular enlargement help in the growth of the stem above the ground and the growth of the root below the ground.

• Intercalary Meristems

The intercalary meristems are located at the internodes or the base of the leaves. The intercalary meristems help in increasing the length of the internode. This is usually seen in monocotyledonous plants.

• Lateral Meristems

The lateral meristems are present on the lateral side of the stem and root of a plant. These meristems help in increasing the thickness of the plants. The vascular cambium and the cork cambium are good examples of a lateral meristematic tissue.