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A student was given a tissue to observe under the microscope. He observes the tissue and concludes that the tissue is a type of simple plant tissue and provides mechanical support to young stem and petiole of leaf.
Identify the tissue.

A. Parenchyma

B. Collenchyma

C. Sclerenchyma

D. Xylem parenchyma

Correct Answer : B.


The tissue is collenchyma. Collenchyma is a type of simple tissue which occurs in layers below the epidermis of dicotyledonous plants. It consists of living usually elongated cells with unevenly thickened walls (due to deposition of cellulose, hemicellulose and pectin) and acts as support especially in areas of primary growth. This tissue provides mechanical support to the rowing parts of the plants such as young stem and petiole of a leaf.

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