Which of the following makes up most of an old tree trunk?

Which of the following makes up most of an old tree trunk?
– secondary xylem
– primary phloem
– meristem tissue
– primary xylem
– secondary phloem

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Sourav PanSeptember 5, 2024

Answered

Most of an old tree trunk is made up of secondary xylem. As the tree grows, the vascular cambium produces secondary xylem (wood) toward the inside, which accumulates over the years and makes up the bulk of the trunk.

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