Question

18. In an experiment a leaf from a potted plant which had been kept in the dark overnight was boiled in water for a minute. It was then boiled in alcohol and washed in water. Iodine solution was then added to the leaf on a white tile. a) Why was the leaf boiled in: i) Water (1 Mark) ……………………………………………………………………………………………… ii) Alcohol (1 Mark) ………………………………………………………………………………………………

Answer 1

Answer:

Ask question properly please .......

Answer 2

Explanation:

The hot water kills the leaf and the alcohol breaks down the chlorophyll, taking the green color out of the leaf. When you put iodine on the leaves, one of them will turn blue-black and the other will be a reddish-brown. Iodine is an indicator that turns blue-black in the presence of starch. The leaf that was in the light turns blue-black, which demonstrates that the leaf has been performing photosynthesis and producing starch.