KNEC KCSE Biology Paper 3 Question Paper / 2016 KCSE 4MCK Joint Exam

You are provided with specimen labeled T, iodine sodium and Benedict’s solution. Use it
to carry out the tests below

Take specimen T and using the scapel provided, cut the roots and grind them using a
pestle and mortor. Using the reagents, test for the food substances present. Repeat the
same procedure for the bulb and leaves. Enter your findings in the table below:

The photographs below shows some fruits

a) (i) Name the type of fruit shown in photograph J. (1 mark)
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(ii) Give one reason for your answer in 2.a) (i) above. (1 mark)
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(iii) State the type of placentation in fruit J (1 mark)
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(iv) Suggest the agent of dispersal for fruit J. (1 mark)
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(v) State two ways in which the fruit in photograph J is suited to it’s mode of dispersal. (2 marks)
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b) (i) Name the type of fruit in photograph K. (1 mark)
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(ii) State one way in which the fruit in photograph K is suited to its mode of dispersal (1 mark)
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c) Observe fruit labeled L.
Draw a well labeled diagram of one of the fruits when opened. (4 marks)

The photograph below represents an aquatic animal. Observe it carefully then answer the
questions that follow

a) (i) Identify the class to which the specimen belongs. (1 mark)
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(ii) State the reasons for your answer in a(i) above. (4 marks)
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b) Name the functions of parts labeled G₁, G₃, and G₄ (3 marks)
G₁
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G₃
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G₄
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c) The photograph below was removed from exposed G₃‍

(i) Identify the specimen. (1 mark)
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(ii) State the function of the structure shown by the photograph. (1 mark)
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(iii) State four adaptations of the structure to its function. (4 marks)
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