Cells on the shaded side of a plant stem become more elongated. In which direction will the plant bend?
Answer and explanation
Correct answer: Towards the light
Phototropism results from unequal growth on the two sides of a shoot. If cells on the shaded side elongate more, that side becomes longer and acts like the outer side of a bend. The shorter illuminated side becomes the inner side, so the shoot curves towards the light. Therefore option A is correct; the other choices describe unrelated or unsupported directions.
Frequently asked questions
What is the correct answer to this question?
Towards the light
Why is this the correct answer?
Phototropism results from unequal growth on the two sides of a shoot. If cells on the shaded side elongate more, that side becomes longer and acts like the outer side of a bend. The shorter illuminated side becomes the inner side, so the shoot curves towards the light. Therefore option A is correct; the other choices describe unrelated or unsupported directions.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Control and Coordination. Topic: Plant hormones.
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