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If a plant root grows towards water even against gravity, which response is more clearly dominant?

Answer and explanation

Correct answer: Hydrotropism

Tropisms are directional growth responses to external stimuli. Phototropism is a response to light, thigmotropism to touch, and chemotropism to chemicals. When a root bends or grows toward a source of water, the defining stimulus is moisture or water, so the response is hydrotropism. Gravity may also influence roots through geotropism, but the situation specifically highlights growth toward water. Hence B is correct.

Related tags

HydrotropismTropismPlant ResponseControl And CoordinationWorld Of LivingScienceClass 10 Mcq

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