Question

After iodine test which part of the leaf turns blue black and why

Answer 1

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-blackin 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.

Answer 2

Explanation:

After adding iodine to the leaf, the part containing starch turns blue black as this change in colour indicates the presence of starch.

Hope it is helpful to you. Please mark as brainiest and follow me.