A nail is nailed into the trunk of a tree at a point 1 m from the soil level. After 2 years the nail will
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Correct Answer: Option A
Detailed Explanation:
Trees grow in height from apical meristems (shoot and root tips), not by elongating the trunk itself.
The nail remains at 1 m height because secondary growth (cambium activity) only increases girth, not vertical position of existing trunk sections.
Question 5 of 20 Plant Physiology
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