State whether the following statements are true or false. If a plant is laid on its side, cells on the lower side of the stem will respond to gravity and elongate, making the stem turn so that it continues to grow upward.
A
True
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B
False
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Solution
The correct option is A True Gravitropism is the movement of a plant according to the force of gravity if the plant moves in the direction of gravity then it is said to be positive geotropism and if not then its negative geotropism. The plant when laid on its side and the cells of the lower stem will grow towards and the elongate so that they can grow upwards, this is all due to the stimulus. The force of gravity ensures that roots grow into soil towards downward direction while stems have grown upwards towards sunlight.