Question

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

Answer 1

The correct option is C

Remain at the same position

The correct option is C:

Explanation of correct option:

1. Even after three years, a nail planted at a height of one meter from the bottom of a tree trunk remains at the same level.
2. It doesn't travel upwards because the apical meristem, which is responsible for growth (length), is only present at the apices, and the lateral meristem, which is responsible for girth gain, will not produce any change over time.
3. Apical meristems help the plant grow long. The apical meristem is found at the root's tip and in the shoots. A nail is put into the trunk's permanent tissue, which is the component that does not divide.
4. Plants only grow sideways during insufficient sunlight. During this condition, it grows in the direction of light. As there is no growth sideways the nail, does not move sideways.

Final answer: A nail is inserted in the trunk of a tree at a height of 1 meter from the ground level. After 3 years the nail will remain in the same position.