19. A leaf is detached from a tree and tested with iodine. The leaf turns dark blue. (a) What does this result tell you? why is the results not sufficient to confirm photosynthesis took place
If the leaf goes blue and is tested with iodine. The results arent accurate if the leaf was free from starch in the first place. You also can't really say it's photsynthetis if there was starch in the leaf beforehand.
