Question

bark cells are impervious of gases and water,what exeperimentwill you perform to prove this

Answer 1

Bark cells are mostly impervious to water and gases due to deposition of a material calledsuberin. However, there are pores at some locations in the bark called lenticels that allowexchange of gases.
              there is no specific experiment to prove this. However, by studying the anatomy of plants, it has been provedthat they are impervious to water and gases.

Answer 2

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. ♦ in big tress dermal tissue forms several layers above the epidermis it is called bark.

. ♦ The several layers of bark does not allow any things like gases amd water to pass through it.

. ♦ hence bark cells are impervious to gases and water.