You’re provided with a solution labeled L, starch solution and sodium chloride solution in two different concentrations of 0.1% and 1.4%. Place 3ml of starch solution in test tubes labeled 1,2 and 3. Add 3 drops of 0.1% sodium chloride to the test tube labeled 3. Add 3mls of solution L to each test tube labeled 2 and 3.
a) Place a drop of contents from each test tube 1,2 and 3 on a white tile. To each drop add iodine solution. Record your results in the table below ( 1 ½mk)
Test tube Observation at start of experiment

b) Place the test tubes in water bath maintained at 370c. Allow to stand for 30 minutes place a drop of the contents from each test tube on a white tile . To each drop, add iodine solution. Record your observation in the table below. (1½mk)
Test tube Observation at start of experiment

c) Add equal amounts of Benedicts solution in test tubes labeled 2 and 3. Boil and record observations in the table below. (1mk)
Test tube Observation at start of experiment

d) Why was the test tube labeled 1 included in the experiment. (1mk)
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e) Account for the results in the test tube 1,2 and 3 at the end of the experiment. (3mks)
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f) Suggest the identity of solution L. (1mk)
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g) Why were the test tubes placed in water bath maintained at 370c. (1mk)
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You are provided with specimens labeled R,S and T. Examine them carefully and answer the following questions.
a) Name the phylum and class to which specimens R and S belong and give two reasons for your answers. (4mks)
Phylum…………………………………………………………. (1mk)
Reasons……………………………………………………….. (1mk)
Class ……………………………………………………………….(1mk)
Reasons ……………………………………………………………(1mk)
b) State two differences between the wings of specimen R and S (2mks)

c) Draw and label the front view of the head of specimen S. (4mks)
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d) Identify specimen T (1mk)
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e) In the spaces provided draw and label at least four parts of specimen T. (3mks)
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f) With observable features only, state the a gent of pollination (3mks)
Agent of pollination……………………………………………………………………………………………………..(1mk)
Reasons…………………………………………………………………………………………………………….
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You are provided with D1,D2,D3 and D4.
Examine them.
a) Draw and label specimen D1 (3mks)
b) Giving reasons, state the agents of methods of the specimen (8mks)