Question

to demonstrate that sunlight is essential for photosynthesis​

Answer 1

${\huge{\underline{\bold{ \purple{\tt{Answer}}}}}}$

__________________________

❍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

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