Tissue present in an annual ring is

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(C) Annual rings are formed by the activity of the vascular cambium,which produces secondary xylem towards the inner side and secondary phloem towards

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Secondary xylem only

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(C) Annual rings are formed by the activity of the vascular cambium,which produces secondary xylem towards the inner side and secondary phloem towards the outer side.However,the annual ring specifically refers to the concentric layers of secondary xylem formed during a single growing season (spring wood and autumn wood).Secondary phloem is crushed and does not contribute to the formation of the distinct annual ring structure used for age estimation.Therefore,the annual ring is primarily composed of secondary xylem.

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