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 Form 1 Biology Nutrition in Plants Questions and Answers

In an experiment to investigate a factor affecting photosynthesis, a leaf of a potted plant which had been kept in the dark overnight was covered with aluminum foil as shown in the diagram below.
The set up was kept in sunlight for three hours after which a food test was carried out on the leaf.
(a) Which factor was being investigated in the experiment?
(b) What food test was carried out?
(c) (i) State the results of the food test.
(ii) Account for the results in c (i) above.
(d) Why was it necessary to keep the plant in darkness before the experiment?

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