Question

Why are tissues of sclerenchyma are dead and thick?

Answer 1

because they are the protective layer of the plants

Answer 2

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It is made up of lignin. Note:Examples for the parenchyma cells are in the fruit, leaves, petioles, seeds etc. The collenchyma cells are located in the young part of the step and can break with the small amount of force. The example of sclerenchyma cells are the stem regions at the base and are very hard to break.