Biology / Bio 2517 · Atom · ~20 seconds

Why a Nail in a Trunk Never Rises

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A nail hammered into a tree trunk stays at the same height above ground for the tree's life.

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Because primary growth per Bio 2513 occurs only at apical meristems, the trunk section holding the nail never elongates further.

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"A tree grows taller from the base," per Bio 2515, mistakes lower-trunk girth increase for lengthwise growth that does not occur there.