A plant is kept in the dark for two days. A leaf is used in an experiment to investigate the effect of two factors on photosynthesis as shown in the diagram.
What are the colours of Q and R, when the leaf is tested for starch, using iodine solution?
Q |
R |
(a) Blue/blck |
Brown |
(b) Brown |
Brown |
(c) Blue/black |
Blue/black |
(d) Brown |
Blue/black |
A. (a) B. (b) C. (c) D. (d)