Answers

2015-07-25T17:32:23+05:30
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 proved that they are impervious to water and gases.
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