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Question

What is the main plant tissue that forms the annual rings in the trunk of some trees?


A

xylem

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B

phloem

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C

cork

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D

epidermis

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Solution

The correct option is A

xylem


The annual rings are formed by secondary xylem because the growth in spring and autumn seasons forms spring and autumn wood. The definition of wood is secondary xylem, reflected by the origin of the term ‘xylem’, the Greek word xylon, for wood.


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