Physics · Light and Photosynthesis
A student notices that a leaf exposed to sunlight for 6 hours stains dark blue with iodine, but a shaded leaf stains lightly. Which explanation is most scientifically valid?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Shaded leaves absorb iodine more slowly.
- 2The iodine reacts differently in shaded leaves due to moisture content.
- 3Light exposure increases starch synthesis, causing stronger staining.✓
- 4Shaded leaves contain less chlorophyll, so they produce less starch.
Correct answer
Light exposure increases starch synthesis, causing stronger staining.
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