15. Show experimentally that:
fa) food (starch) is produced in green leaves
during day-time.
(b) Green leaves are left starch free when
kept in dark for 4 to 5 hours.
Answers
Answered by
24
take potted plant and put plant in dark for 2 days, so that all starch in leafs exhaustible. take two thin cardboard. tie this cardboard with one leaf of the plant both the side of it. leave a pot in sunlight for one day.
next day break leaf and remove cardboard. wash the leaf fist boiling water and then with alcohol so that all green colour of leaf will remove.now put some iodine drops on leaf surface.
you observe that the part of leaf which is under the cardboard is not appear black in colour after adding the iodine solution on it because it not contain starch in it
which prove that leaves make food for the plant
Similar questions