Question

In the given photosynthetic experiment what Wii happen to the leaf closed with black paper in starch test why?

Answer 1

it is because black more absorb of heat cells will use complete energy or glucose

Answer 2

Leaves show blue color in starch test, in regions where starch is abundant. Starch has a complex helical structure so that it can hold I2 (Iodine molecules).Cellulose dosen't show blue color in starch test due to lack of complex helical structure.

Let me tell you something interesting about starch test.

If you keep a plant in darkness for 24 hours and subject it starch test you will be disappointed ,because the leaves don't give blue color .

Can you say why?

Due to absence of sunlight plants do not perform photosynthesis and hence no production of sugar or starch.

Hope you are satisfied with my answer.