Cameroon GCE ordinary level June 2026 biology 2

Ultimate Structural Revision Bank: GCE Ordinary Level Biology

Earning an “A” grade in your Cameroon GCE Ordinary Level Biology theory paper requires precision, clear labeling skills, and the ability to organize biological facts systematically.

The following structured, long-answer questions compiled from image_77502a.jpg offer an excellent way to evaluate your knowledge. The questions are divided into Section A (Compulsory) and Section B (Answer any 2), covering core syllabus areas such as entomology, plant transpirational mechanics, biotechnology definitions, food web construction, skin histology, respiration experiments, and genetics.

SECTION A

Answer ALL 3 questions

Question 1: Insect Biology & Metamorphosis

• (a) (i) List eight (8) characteristics common to insects.

  • (ii) Draw a large labelled diagram of a dipteran fly. (4, 5 marks)

• (b) Give five (5) reasons why insects are highly successful in their habitat. (5 marks)

• (c) Insects undergo either complete or incomplete metamorphosis in their life cycles. Differentiate between these two developmental cycles. (6 marks)

• (Total = 20 marks)

Question 2: Plant Water Relations & Transpiration

• (a) List the environmental factors that affect the rate of transpiration. (5 marks)

• (b) How is water in the cortex of roots of plants made available for photosynthesis in the leaves? (7 marks)

• (c) How would you measure the rate of uptake of water by a leafy shoot in a bright sunny day? (8 marks)

• (Total = 20 marks)

Question 3: Biotechnology & Ecology Ecosystems

• (a) Define the following terms as used in Biotechnology:

  • (i) Plasmid.

  • (ii) Vector.

  • (iii) Ligase.

  • (iv) Bacteriophage.

  • (v) Clone. (2, 2, 1, 2, 2 marks)

• (b) Differentiate between a food chain and a food web. (6 marks)

• (c) In an abandoned school farm, the following organisms were discovered to be living there after a period of three years: hawks, green vegetation such as huckleberry and cabbage, nymphs of grasshopper, flying grasshoppers, toads under green vegetation, earthworms under rotten logs of wood and lizards. Using the above organisms, construct a suitable food web to establish the relationship between these organisms. (5 marks)

• (Total = 20 marks)

SECTION B

Answer any 2 questions

Question 4: Homeostasis & Skin Anatomy

• (a) Define the following terms:

  • (i) Excretion.

  • (ii) Osmoregulation. (3, 2 marks)

• (b) Draw a large labelled diagram of the mammalian skin. (8 marks)

• (c) How does the skin function in temperature regulation during over-heating? (7 marks)

• (Total = 20 marks)

Question 5: Respiration & Gas Exchange

• (a) (i) What is respiration?

  • (ii) List five (5) properties of the lungs that make it an efficient respiratory surface. (4, 5 marks)

• (b) How does a molecule of oxygen in the atmosphere reach the lungs of a mammal? (4 marks)

• (c) How would you demonstrate that germinating seeds evolve heat during respiration? (7 marks)

• (Total = 20 marks)

Question 6: Genetics, Adaptation & Parental Care

• (a) Define the following terms giving examples of each:

  • (i) Cell division.

  • (ii) Gene.

  • (iii) Homozygous. (3, 3, 3 marks)

• (b) How is an insect pollinated flower different from a wind pollinated flower? (6 marks)

• (c) How do mammals carry out parental care after birth? (5 marks)

• (Total = 20 marks)

Question 7: Digestive Anatomy & Plant Assimilation

• (a) Draw a well labelled diagram of the internal structure of a villus. (9 marks)

• (b) State six (6) ways in which herbivorous mammals are adapted to their diet. (6 marks)

• (c) What is the fate of the end products of photosynthesis? (5 marks)

• (Total = 20 marks)

Key Strategy Tips for Biological Diagrams

Drawing for Full Marks: Look at Question 4(b) and Question 7(a). They award 8 marks and 9 marks purely for diagrams! When sketching structures like the mammalian skin or a villus:

1. Use a sharp pencil for clean lines (never sketchy or shaded).

2. Ensure your guidelines are straight, parallel, and touch the specific tissue layer being named.

3. Always include a descriptive title underneath your drawing.

Can you outline the step-by-step experiment for Question 5(c) showing how germinating seeds release heat? Share your laboratory setup ideas in the comments below! Don’t forget to use your Kawlo App to cross-check your responses with official regional mark guides.