Q10 of 51 Page 30

Arrange the following in the sequence you would find them in a plant starting from the periphery – phellem, phellogen, phelloderm.

Phellem or cork is the outer most layer, followed by phellogen (cork cambium) which in turn is followed by phelloderm (secondary cortex).

Hence the sequence is as follows:


Phellem → Phellogen → Phelloderm


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8

What constitutes the cambial ring?

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Give one basic functional difference between phellogen and phelloderm?

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If one debarks a tree, what parts of the plant is being removed?

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The cross-section of a plant material showed the following features when viewed under the microscope.

a. The vascular bundles were radially arranged.


b. Four xylem strands with exarch condition of protoxylem.


To which organ should it be assigned?