As part of a laboratory experiment, a thin slice
of peeled raw potato weighing 10 grams is
placed in an oven at 80°C. After 5 hours, the
potato sample is removed from the oven and
weighed again. The purpose of this experiment
might be to
(1) test for the presence of starch in living
tissues
(2) isolate cells in various stages of cell division
(3) determine the water content of potato
tissue
(4) study the rate of photosynthesis in potatoes