My full question.
A leaf was plucked from the garden. The procedure for testing for starch in the leaf was carried out. Part of the leaf turned blue-black and part of the leaf just turned brown.
Question : Why do you think the other part of the leaf did not contain starch?
1 answer
The test for starch is to add I2. The presence of starch is indicated by the dark-blue color formed upon the addition of the I2. The part that didn't turn blue-black has stopped making carbohydrates (starch) due to injury or natural dying of the leaf or due to seasonal changes (summer to fall).
0 answers