alleryThe increase in GIRTH (thickness) of a tree trunk is due to:
AIntercalary meristem
BXylem
CLateral meristem (cambium ring in the stem)
DApical meristem
Answer & Solution
Correct answer: C. Lateral meristem (cambium ring in the stem)
Lateral meristem (cambium) forms a ring inside the stem.
Its cells divide outward and inward, adding new layers — increasing the trunk's diameter year after year.
The annual rings you see in cut tree trunks are records of lateral meristem activity.
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