In the second part of the experiment, 4 to 5 leaves of the same plant were covered with black paper without removing them from the plant. The way the black paper was cut and fixed to the leaves is shown in the figure. These leaves were plucked two days later. Their green colour was removed and they were dipped in iodine solution. The leaves turned black in the pattern shown in the figure.
On the basis of this experiment, what connection do you notice between light and starch formation?
Important Questions on Nutrition in Plants
What path does it follow?
Let us recall the experiment done in the chapter “Plants: Parts and Function” of class VI, which showed how water is transported in the plant body.
On the basis of this experiment, what conclusion can you draw about the functions of the root and stem in the nutrition of plants?
We know that plants take water through their roots and air through the stomata of their leaves (there are some other parts like loose tissues and lenticels present on the bark of plant through which exchange of air takes place). We also know that leaves contain the green substance, chlorophyll.
What else is needed for photosynthesis?
Name the following:
Pores through which leaves exchange gases.
