Answers

2015-09-14T08:20:09+05:30
Outer layer of the trees is covered with bark, which gives it strength and protect the plant from injury and infection. The bark is made up of dead cells of different origins. While the outer layer of young tree stem is made up of living cells. 
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HEY BHAVYA U R STILL A EXPERT ONLY?????
nope i just became an expert a few days ago..