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If a potted plant is placed on its side, the root tip will most likely continue to grow:

Question
If a potted plant is placed on its side, the root tip will most likely continue to grow:
Horizontally, ignoring gravity
Downwards, due to positive geotropism
Upwards, due to negative geotropism
In a random direction
Answer
Downwards, due to positive geotropism
Detailed Explanation
Roots are positively geotropic and will reorient to grow downwards in response to gravity, even if the plant is placed on its side.
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