SECTION A

Answer all questions in this section

1. In what direction does translocation occur in plants?

2. Name two tissues that are likely to be removed when a stem is removed

3. Name the last blood vessel that will transport glucose to the heart if glucose solution is injected through the arm (b) which chamber of the heart receive the glucose solution.

 4 Which part of the brain controls breathing? The Diagram  below illustrates two homologous chromosomes during meiosis. Use  it to answer question 5

5. Name those points labeled i (b)What is the Importance of those in evolution?  (c)  what is this  stage of melosis called?

Study diagrams i and ii below and use them to answer question 6

6. (a) Identify the organism illustrated in diagrams i and ii

   (b) State the levels of organization of i and ii

   (c) State a reason for placing i and ii in that level of organization.

        Study the diagram below and use it to answer question 7

7. (a) Name the parts labeled i to iv  (b) What is the function of the part labeled I?

         Study the diagram below and use it to answer questions 8 (a) and (b) 

8. (a) What is the set-up used for?  (b) Why is the leafy shoot cut under water when setting up the environment? (c) Name the instrument used for measuring water turbidity.

9. (a) Name three methods of preventing food spoilage.   Study the diagram below and use it to answer question 10 (a) and (b).

10. (a) Name the parts labeled i to iv (b) State the functions of the parts labeled ii and iv  (c) In which organ in the mammalian body is urea formed?

                                                                                               SECTION B

Answer all questions in this section

11. (a) You are provided with specimens A and B (a) (i). Cut a piece of Specimen A, put a drop of iodine on it then record your observation.

(ii) From your observation, what food nutrient does specimen A contain?      (ii) Give reasons for your answers 

      (b) Put a drop of specimen B on the top right hand corner of your question paper using a glass rod. Spread the drop. Clean the glass rod to remove every trace of specimen B. Allow both drops of specimen B and water to dry

      (i) Record your observation   (ii)   From your observation, what food nutrient does specimen B contain?      (ii) Give reasons for your answers.

   (c) Put 4cm\(^3\) of specimen B in a test tube and add 5cm\(^3\) of water.(i) Record your observation (ii) Shake the content thoroughly and leave it for 3 minutes to settle

         Record your observation. 

    (d) (i) Add 2cm\(^3\) of NaOH to 5cm\(^3\) of specimen B in a clean test tube. Shake thoroughly and observe the mixture.  Record your observation.

          (ii) What substance in the alimentary canal plays the same role during digestion in mammals as NaOH in this experiment?

12. You are provided with specimens C and D (a) Identify specimen C and D: (i) State the part to which each of the specimens C and D (ii) State two differences specimens C and D.

           (b) How can you propagate specimen C?  (ii)  Give one reason for your answer based on observable feature of specimen C

           (c) Make a labeled diagram 10-12cm long of specimen C to show its external features.

13. (a) identify specimens E and F (b) Suggest the agents of pollination of specimen E (c) Give  three reasons  for your suggestion in (b)

                In a tabular form, State three differences specimens E and F.  (e) with a sharp blade or scalpel cut a longitudinal section of specimen E to produce two equal parts of specimen E. Make a labeled drawing 10 cm to 12 cm, of one half ofspecimen E