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What is the combined meaning of positive geotropism and negative phototropism in roots?

Answer and explanation

Correct answer: Root grows towards gravity and away from light

The governing concept is directional growth, or tropism. “Positive” geotropism means growth in the direction of gravity, so a root generally grows downward into the soil. “Negative” phototropism means growth away from light. Therefore, both descriptions together identify option A. Option B reverses both directions, while options C and D describe chemical or touch responses rather than the two stated stimuli.

Related tags

RootGeotropismPhototropismControl And CoordinationWorld Of LivingScienceClass 10 Mcq

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