NEET2015Botany-Plant Growth and Development
NEET 2015 Botany Phototropism MCQ Question
Type: MCQ-conceptual-Medium-Class 11
What causes a green plant exposed to the light, on only one side, to bend toward the source of light as it grows?
A
Light stimulates plant cells on the lighted side to grow faster.
B
Auxin accumulates on the shaded side, stimulating greater cell elongation there.
C
Green plants need light to perform photosynthesis.
D
Green plants seek light because they are phototropic.
Correct Answer
Option C
Detailed Explanation
Auxin, a plant hormone, accumulates on the shaded side of the plant, causing cells to elongate more on that side and the plant to bend toward the light.
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