Why are phototropism and hydrotropism called tropisms?
Answer and explanation
Correct answer: Because they are growth responses linked with a particular direction
A tropism is a directional growth response of a plant part to an external stimulus. In phototropism, the direction of light influences growth, while in hydrotropism, the direction of water or moisture influences root growth. The response may be positive, toward the stimulus, or negative, away from it. Thus option A gives the defining feature; the other choices are unrelated or factually incorrect.
Frequently asked questions
What is the correct answer to this question?
Because they are growth responses linked with a particular direction
Why is this the correct answer?
A tropism is a directional growth response of a plant part to an external stimulus. In phototropism, the direction of light influences growth, while in hydrotropism, the direction of water or moisture influences root growth. The response may be positive, toward the stimulus, or negative, away from it. Thus option A gives the defining feature; the other choices are unrelated or factually incorrect.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Light Reflection and Refraction.
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