BI-765
Photosynthesis equation
Biology · Secondary 3 · Medium · Photosynthesis equation
In an experiment, a leaf is completely covered with black paper except for a small window in the centre. The plant is left in sunlight for 4 hours and then the leaf is tested for starch.
Which result supports that light is needed for photosynthesis?
Which result supports that light is needed for photosynthesis?
- Entire leaf turns blue‑black with iodine.
- Only the covered parts turn blue‑black with iodine.
- Only the exposed window turns blue‑black with iodine.
- No part of the leaf changes colour with iodine.
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