Question

A part of destarched leaf of a potted plant was coveredwith black paper strips on both sides and the plant was kept in the sunlight for eight hours. The leaf was then tested with iodine after boiling it in alcohol. Only the uncovered part of the leaf turned blue Hack The inference is that

CBSE Class X Science SA 1 ( 2 marks)

Answer 1

In the experiment, the black paper used for covering prevents light. The inference is that light is necessary for photosynthesis.

Answer 2

Because starch is produced in the uncovered area of leaf which turns blue black in the presence of iodine solution.