If a plant receives light from one side and auxin collects on the shaded side, what will happen?
Answer and explanation
Correct answer: The shaded side will grow more and the stem will bend toward the light
The governing concept is positive phototropism caused by unequal auxin distribution. In a shoot, auxin promotes cell elongation. When light comes from one side, more auxin accumulates on the shaded side, so cells there elongate more than cells on the illuminated side. This unequal growth bends the stem toward the light. Thus A is correct; the other choices do not describe the normal auxin response in a shoot.
Frequently asked questions
What is the correct answer to this question?
The shaded side will grow more and the stem will bend toward the light
Why is this the correct answer?
The governing concept is positive phototropism caused by unequal auxin distribution. In a shoot, auxin promotes cell elongation. When light comes from one side, more auxin accumulates on the shaded side, so cells there elongate more than cells on the illuminated side. This unequal growth bends the stem toward the light. Thus A is correct; the other choices do not describe the normal auxin response in a shoot.
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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