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MCQ
Which meristem is responsible for increasing the girth (diameter) of a plant stem or root?
Unit-5 Tissues Organs and Organ Systems
A Apical meristem
B Lateral meristem
C Intercalary meristem
D Ground meristem
Explanation

Lateral meristem (vascular cambium and cork cambium) adds new layers, increasing the thickness of stems and roots.

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