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  • A nail is inserted in the trunk of a tree at a height of 1 metre from the ground level. After 3 years the nail will (a) move downwards (b) move upwards (c) remain at the same position (d) move sideways

A nail is inserted in the trunk of a tree at a height of 1 metre from the ground level. After 3 years the nail will
(a) move downwards
(b) move upwards
(c) remain at the same position
(d) move sideways

 

Answers (1)

Plant growth occurs due to meristematic tissues, which are responsible for increasing height (primary growth) and thickness (secondary growth). The apical meristem, located at the tips of roots and shoots, drives elongation, while the lateral meristem, found in the vascular cambium and cork cambium, increases the plant's girth. If a nail is inserted into a tree trunk at a height of 1 meter, it remains at the same height over the years because trunk elongation occurs only at the apex, not in the middle. The lateral meristem thickens the trunk around the nail without altering its vertical position. This highlights the localized nature of plant growth, with apical meristems governing height and lateral meristems contributing to girth.
The correct option is (c)- to remain in the same position

 

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infoexpert27

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