CBSE Class 9 Answered
Explain how the bark of a tree is formed. How does it act as protective tissue?
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
Expert Answer
Strip of secondary meristem replaces the epidermis of the 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 and have a chemical called suberin in their walls that makes them impervious to gases and water.
Answered by | 04 Jun, 2014, 03:23: PM
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