FORM 4 BIOLOGY QUESTION PAPER 3 Model1332017.pdf

Comes with Marking Scheme!

Unlock the secrets of biology with our comprehensive study guide for the Biology Paper 3 Practical exam! This resource covers essential experiments, including plant material observation, skull analysis, and juice testing. Gain insights from expert explanations and improve your understanding of key concepts. Ideal for Form 4 students preparing for exams!

CONFIDENTIAL INSTRUCTIONS

• 10 Stems of Fradescautia – Two pieces, each measuring 4 cm.
• Scalpel (or means of cutting) – For cutting plant materials.
• S1 Solution – 50 cm³ of distilled water in a 100 ml beaker.
• S2 Solution – 50 cm³ of concentrated sugar solution in a 100 ml beaker.
• Specimen C – A ripe orange fruit with seeds.
• 1% Copper (II) Sulfate Solution – For chemical testing.
• 10% Sodium Hydroxide Solution – For chemical testing.
• Benedict’s Solution – For testing reducing sugars.
• 4 Test Tubes – For carrying out experiments.
• Hand Lens – For magnifying small details.
• 2 Droppers – For transferring liquids.
• 10 ml Measuring Cylinder – For measuring liquid volumes.
• Means of Heat – For heating substances during experiments.

Featured Experiments

• Plant Material Experiment:
  • You are provided with a piece of plant material specimen D. Using a scalpel, cut a slit through the middle of each piece. One piece is placed in solution labeled S1 and the other in solution labeled S2. The setup is allowed to stand for 30 minutes.
    • (a) After 30 minutes, remove the pieces and press gently between fingers.
      • (i) Record the observation made in the piece in solution S1 and in solution S2.
      • (ii) Explain the observations made in (a)(i).
    • (b) (i) On careful examination of the pieces, what other observations beside those made in (a)(i) can be made?
      • (ii) Explain the observation in (b)(i).
• Skull Examination:
  • Use the photographs of the two skulls provided to answer the questions below.
    • (a) Identify the diet of A and B. Provide reasons for your answers.
    • (b) Identify specific parts of the skulls and state their functions.
• Specimen C Analysis:
  • You are provided with specimen C.
    • (a) Cut a transverse section through specimen C.
      • (i) Draw and label one of the cut surfaces.
      • (ii) State the type of placentation on specimen C.
    • (b) Explain how internal features adapt specimen C for dispersal.
    • (c) Perform an experiment using the juice from specimen C and record observations and conclusions.