The following picture shows positive .

geotropism

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hydrotropism

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phototropism

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thigmotropism

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Solution

The correct option is B hydrotropism
Growth towards water is called hydrotropism. Roots show positve hydrotropism. Phototropism is in reponse to light; thigmotropism is in response to touch; geotropism is in response to gravity. The picture indicates growth of roots towards water showing positive hydrotropism.

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In the given pictures, which one shows the correct sign positions?

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