KCSE BIOLOGY 2008 PAPER 3 QUESTIONS
PRACTICAL
Below is a photograph of a dissected mammal. Examine the photograph
(a) Name the parts labeled A, B, C, D and G (5 mks)
(b) State the function of the structures labeled E and F (1 mk)
(c) In the photograph label the structure where vitamin K is produced (1 mk)
(d) (i) Name the sex of the mammal in the photograph (1 mk)
(ii) Give a reason for your answer in (d) (i) above (1 mk)
(e) (i) The actual length of the dissecting scissors in the photographs is 15 cm. Calculate the magnification of the photograph (2 mks)
(ii) Calculate the actual length of the mammal from the tip of the nose to point X on the tail (2 mks)
2. You are provided with substances labeled S, T, U, X and Y. S, T and U are food substances, while X is 10% sodium hydroxide solution and Y is 1% copper sulphate solution. Carry out tests to determine the food substance(s) in S, T and U. (9 mks)
| Substance | Food substance being tested for | Procedure | Observations | Conclusion |
|---|---|---|---|---|
| S | ||||
| T | ||||
| U |
3. Below are photographs of specimens obtained from plants. Examine the photographs
| Specimen | Mode of dispersal | Adaptive features |
|---|---|---|
| K | ||
| L | ||
| M | ||
| N | ||
| P | ||
| Q |
- (i) Label any two parts on specimen L (2 mks)
(ii) State the type of placentation in specimen L (1 mk)
- Name the structure labeled W on specimen P (1 mk)
