Question

how can you prove that sun light is nessary to photosynthesis​

Answer 1

Explanation:

The leaf which turned blue-black is a leaf which is placed in sunlight, and photosynthesis occurred and starch was produced. - So starch is produced only in the leaves which are exposed to sunlight, and this proves that sunlight is very essential for plants to do photosynthesis.

Answer 2

Answer:

without sunlight the atp can't provide energy to to combine CO2 and H2 to make glucose