An iodine test of a tomato plant leaf revealed that starch was present at 5:00 p.m. on a sunny afternoon in july. when a similar leaf from the same tomato plant was tested with iodine at 6:00
a.m. the next morning, the test indicated that less starch was present in this leaf than in the leaf tested the day before. this reduction in starch content occurred because starch was

Question

02-01-2018
Biology

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An iodine test of a tomato plant leaf revealed that starch was present at 5:00 p.m. on a sunny afternoon in july. when a similar leaf from the same tomato plant was tested with iodine at 6:00
a.m. the next morning, the test indicated that less starch was present in this leaf than in the leaf tested the day before. this reduction in starch content occurred because starch was

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jamiexx jamiexx · Answer 1 · 2018-01-03T00:19:04+01:00

The reduction of starch content occurred because the starch storage has been used during the night time.

During the night time, the plant cannot undergo photosynthesis, the only way the plant make food (starch) for themselves. However, during the night time, the plant still need to respire to generate energy for activities such as growth, repair, and to maintain life. This process uses starch.

Therefore, when the requirement for starch is higher than the production rate, the starch content after one night is reduced.