A plant is kept in a dark cupboard for about 48 hours before conducting any experiment on photosynthesis in order to
(a) remove chlorophyll from the leaves.
(b) remove starch from the leaves.
(c) ensure that no photosynthesis occurred.
(d) ensure that the leaves are free from starch.
Photosynthesis occurs in the leaves of plants. So, all the food is concentrated in the leaves. How do other non-green parts of the plants like stems and roots obtain food?