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Zool 0110: Ecology And Environmental Science Question Paper

Zool 0110: Ecology And Environmental Science

Course:Bachelor Of Environmental Science

Institution: Egerton University question papers

Exam Year:2011

TIME: 2 HOURS
INSTRUCTIONS:
Answer ALL questions in section A and any TWO in section B.
Illustrate your answers with diagrams and give examples where appropriate.
SECTION A (40 MARKS)
1.Define the following terms: (10 marks)
a)Ecological niche
Population
Community
Ecosystem
Food Chain
2.Explain in detail the ecological significance of estuaries. (5 marks)
3.Using suitable illustration distinguish between the following;
a)Grazing food chain and detritus food chain. (3 marks)
b)Renewable and non-renewable energy
4.Describe the economic importance of deserts. (6 marks)
5.Explain the term ecological pyramid and state three types of ecological pyramid
(5 marks)
6.Enumerate four ways in which carbon is released into the atmosphere. (4 marks)
7.Explain how the following affect the rate of photosynthesis. (4 marks)
Light intensity
Carbon dioxide concentration
SECTION B: (30 MARKS)
8.Give an account of the economic importance of wetlands. (15 marks)
9.Discuss the most effective ways to prevent air and water pollution. (15 marks)
10.Using a well-labeled diagram, describe the nitrogen cycles and the importance of this element in the environment. (15 marks)

Zool 0110: Ecology And Environmental Science Question Paper

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