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

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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)

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(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)

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