Question

Jack picked a leave from a plant that was kept in dark for 3 to 4 days and did the starch test on it. The leaf did not turn blue black after the test. why?

Answer 1

Answer:

due to absence of chlorophyll in leave

Answer 2

The leaf would only turn blue if it had photosynthesis but jack kept it in a dark room which prevented photosynthesis thus when he did the starch test the leaf did not have starch for the iodine to turn blue black. I think this would help you.