Cameroon GCE O Level past questions GCE Board

CAMEROON GENERAL CERTIFICATE OF EDUCATION BOARD General Certificate Of Education Examination 510 BIOLOGY 2 JUNE 2015 ORDINARY LEVEL KAMERPOWER.COM Cameroon GCE O Level 2015 Biology 2 past Question Paper 2 (Biology II 510 GCE Board) Answer FOUR questions, Two from Section A and TWO from Section B. All questions carry equal marks. Marks allocated to parts of questions are indicated in brackets. If more than TWO questions are answered in Section A or B, only the FIRST TWO shall be marked. Give labelled diagrams where these will make the answers clearer. Begin each question on a new page. You are reminded of the necessity for good English and orderly presentation in your answers. SECTION A 1. (a) What features do insects have in common? (8 marks) (b) How are birds adapted for flight? (12 marks) (c) State, the economic importance of birds. (5 marks) (Total 25 marks) 2. (a) What is photosynthesis? (4 marks) (b) State the differences between photosynthesis and respiration. (14 marks) (c) How is photosynthesis important in living organisms? (7 marks) (Total 25 marks) 3. (a) Define the following terms: (i) Active transport. (ii) Osmosis. (2, 3 marks) (b) Describe an experiment to demonstrate osmosis in living tissue. (10 marks) (c) How does a molecule of water from the soil get to the leaf of a plant? (10 marks) (Total 25 marks) 4. (a) Define the terms: (i) Eutrophication. (ii) Pollution. (iii) Ecosystem. ( 4, 4, 5 marks) (b) How would changes in temperature affect plants? (12marks) (Total 25 marks) SECTION B 5. (a) Make a large labelled diagram of the mammalian skin. (10 marks) (b) State the functions of the parts you have labelled. (10 marks) (c) Briefly compare the mammalian skin and the epidermis of plants. (5 marks) (Total 25 marks) 6. (a) Define the following terms: (i) Homozygous. (ii) Haploid. (2, 3 marks) (b) When Mendel crossed pure breeding red-flowered pea plant with pure breeding white- flowered pea plant, all the members of the F1 generation had pink flowers. Using appropriate symbols and diagrams show the possible genotypes and phenotypes if (i) The F1 individuals are allowed to self pollinate. (ii) An F1 individual is crossed a white- flowered parent. (20 marks) (Total 25 marks) 7. (a) Draw a labelled diagram of the longitudinal section of a mammalian heart. (10 marks) (b) Describe how the mammalian hcart functions. . (15 marks) (Total 25 marks) 8. (a) Define the terms: (i) Predation, (ii) Saprophytism. (3, 2 marks) (b) How will you carry out a simple test to show the presence in germinating seeds of: (i) A reducing sugar. (ii) Protein. (5, 5 marks) (c) The table below shows the population size of both predators and preys within a certain community. The time was recorded in weeks. Time(weeks) 4 7 15 20 26 36 Number of predators 220 190 330 220 130 490 Number of preys 340 440 200 360 640 370 (i) Plot the two curves with time on the horizontal axis and population‘ on the vertical axis. (5 marks) (ii) Determine the population of preys and predators at week 10 and week 20. (4 marks) (iii) Determine the first time when the population of preys will be equal to that of predators. (1 mark) (Total 25 marks) Cameroon GCE O Level 2015 Biology 2 past Question Paper 2 (Biology II 510 GCE Board)

Cameroon GCE O Level past questions GCE Board

Cameroon GCE O Level 2015 Biology 2 past Question Paper 2 (Biology II 510 GCE Board)

Cameroon GCE O Level 2015 Biology 1 past Question Paper (Biology 510 GCE Board)

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