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Question

Commercial cork is a derivative of______.


A

Xylem

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B

Vascular cambium

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C

Phellogen

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D

Phloem

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Solution

The correct option is C

Phellogen


Commercial cork is an impermeable, buoyant material. Cork is composed of suberin, a hydrophobic substance and, because of its impermeable, buoyant, elastic, and fire retardant properties, it is used in a variety of products. It is obtained from a prime-subset of bark tissue which is also called phellogen.


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