Question

40.
Black strip
-> Transparent strip
A destarched leaf on a potted plant was covered with Black
(A) Transparent (B) strips of paper as shown in figure. After 6 hours of
exposure to sunlight the leaf was removed from the plant and tested
for starch. Which are the following will be the correct observation ?
(a) Whole leaf turned blue black.
(b) Only B portion turned blue black.
(c) Only A & B portions remained colourless and the rest of the leaf turned blue
black.
(d) Only A portion remained colourless and the rest of the leaf turned blue black.
1080605

Answer 1

Hiii

Answer:

The presence of blue black colour can be seen where the starch is present .

& If black paper is kept on leaf no photosynthesis & hence no starch formation occur.

Therefore ,

Only A & B areas remain colourless whereas whole leaf gets blue black colour.

( Next time plz see that the attachment is actually attached . )

I hope u got the answer.

Good day