A mature woody stem has a peripheral waterpro | vedclass

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(C) In mature woody stems,the epidermis is replaced by a protective layer called the periderm,which includes the cork (phellem). Lenticels are small,l

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Lenticels

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(C) In mature woody stems,the epidermis is replaced by a protective layer called the periderm,which includes the cork (phellem). Lenticels are small,lens-shaped openings or pores found on the surface of woody stems. These structures allow for the exchange of gases between the internal tissues of the stem and the outer atmosphere. They appear as scars on the bark because they are areas where the cork cells are loosely arranged,allowing for gas diffusion.

$A$ mature woody stem has a peripheral waterproof tissue with openings in the form of scars on its surface. These are:

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Statement-$1$: Heartwood is more durable and resistant to the attacks of microorganisms and insects compared to sapwood.
Statement-$2$: Heartwood contains organic compounds like oils,aromatic substances,gums,resins,tannins,and phenols.

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