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2015 KCSE Kericho West Joint Examination

Biology Paper 3

1.

You are provided with the following solutions labelled E, F, G, H and J on the table.
E - food substance
F - dilute sodium hydrogen carbonate
G - dilute hydrochloric acid
H - Benedict's solution.
Source of heat.
Carry out tests using the reagents provided to determine the food substance(s) presented in solution E (14 marks)
FOOD SUBSTANCE BEING TESTED PROCEDURE OBSERVATIONS CONCLUSION

14 marks

2.

Examine the photograph which shows parts of the urogenital system of a female rat and answer the questions that follow. The organ marked 1 is the stomach.
a) i) Name the organ marked 2 ................................................................................................. (1 mark)
ii) State two functions of the organ. (2 marks)
iii) What is the functional unit of the organ named in (a) (i) above? (1 mark)
b) i) Identify and name each of the organs marked 3 and 4. (2 marks)
ii) State two functions of the part marked 4. (2 marks)
c) i) Identify and name the organ marked 5. (2 marks)
ii) Explain two functions of the organ named c(i) above. (2 marks)
d) The organ marked 6 is the large intestine. State two functions of the large intestine. (2 marks)

14 marks

3.

Study the photographs A and B that shows part of plants in natural habitat.

a) Name the type of the plant response shown in:
i) A.................................................................................................................................(1 mark)
ii) B.................................................................................................................................(1 mark)
b) Explain the mechanisms of the response in
A (3 marks)
B (5 marks)
c) State the biological significance of the response to plants in
A (1 mark)
B (1 mark)
d) Suggest the nature of the habitat that plants with the type of response A grows. (1 mark)

14 marks

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