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.
Frequently asked questions
What is the correct answer to this question?
Hydrotropism
Why is this the correct answer?
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.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Control and Coordination.
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