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Question

The unique cells of secondary phloem rich in starch and proteins of Pinus are

A
Epitherms
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B
Complimentary cells
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C
Transfusion cells
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D
Albuminous cells
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Solution

The correct option is D Albuminous cells
In Pinus, the phloem is madeup of sieve cells and albuminous cells. In the region of phloem, the rays are represented by albuminous cells. The albuminous cell contains some starch granules, the quantity of the starch granules in albuminous cells is less than the other parenchyma cells of the secondary phloem.

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