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1.) What are vascular bundle 2.) How do cork act as protective tissue

Posted by Manya Puri 4 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Meghna Thapar 3 years, 11 months ago

Xylem and phloem makes vascular bundle. As the plant grows older, the outer protective tissue, epidermis undergoes certain changes. A strip of secondary meristem, called phellogen or cork cambium replaces epidermis of stem. Cells on the outside are cut off from this layer. This forms the several-layer thick cork or the bark of the tree. Cells of cork are dead and compactly arranged without intercellular spaces. They also have a chemical called suberin in their walls that makes them impervious to gases and water.

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