Question

Q.1.If a green leaf is covered in the middle with a black paper, we can find a difference between
the covered part and the rest part
a.State the change.
b.Write the reason for change.
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Answer 1

a.if we conduct the starch test the leaf covered with black paper does not change its colour

the part which is not covered changes it's colour to blue black

b.the reason is the part which is covered didn't receive sunlight so starch is not prepared .the part which is not covered received sunlight starch is prepared in it .so colour changes