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29 December, 14:33

What kind of tropism do roots display when they grow downward into the soil?

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  1. 29 December, 14:34
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    It's usually a combination.

    Explanation:

    At first they grow downward in the direction of gravity. This is called geotropism.

    They also grow in the direction of humidity, water. This is called hydrotropism.
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