ObjectiveTo observe excretion taking place in a plant.
MaterialsA plant in a pot, a clear plastic bag, and string or thread.
MethodTake a plant, slip one of its branches into a dry plastic bag, and tie the mouth of the bag tightly so that no air can escape. Look at the bag after four or five hours.
Discussion and conclusionWhat did you see inside the plastic bag? Discuss it and draw a conclusion.
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