Which option contains only examples of growth-based plant movements?
Answer and explanation
Correct answer: Stem bending towards light, root growing towards water, pollen tube growing towards ovule
A growth-based plant movement results from unequal or directional growth and is generally irreversible. The stem bending towards light is phototropism, root growth towards water is hydrotropism, and pollen-tube growth towards the ovule is chemotropism. All three are plant tropisms, so option A is correct. Mimosa folding is a rapid nastic movement rather than growth; the other options describe animal or physiological processes.
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What is the correct answer to this question?
Stem bending towards light, root growing towards water, pollen tube growing towards ovule
Why is this the correct answer?
A growth-based plant movement results from unequal or directional growth and is generally irreversible. The stem bending towards light is phototropism, root growth towards water is hydrotropism, and pollen-tube growth towards the ovule is chemotropism. All three are plant tropisms, so option A is correct. Mimosa folding is a rapid nastic movement rather than growth; the other options describe animal or physiological processes.
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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