Question

What observation shows that photosynthesis can take place?

Answer 1

The inner part of the leaf turns blue black on adding iodine solution which was originally green and shows that starch is present in the inner part of the leaf.Through this observation, we can conclude that photosynthesis takes place in the presence of chlorophyll to make starch.

Answer 2

Observations that show photosynthesis is taking place include the release of oxygen bubbles, the formation of starch in leaves, and the green color of plants due to chlorophyll capturing light energy.