Environment And Ecology Question Paper
Environment And Ecology
Course:Bachelor Of Environmental Studies (Science)
Institution: Kabarak University question papers
Exam Year:2008
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KABARAK UNIVERSITY
UNIVERSITY EXAMINATIONS
2008/2009 ACADEMIC YEAR
FOR THE DEGREE OF BACHELOR OF ENVIRONMENTAL
SCIENCE
COURSE CODE: ENVS 222
COURSE TITLE: ENVIRONMENT AND ECOLOGY
STREAM: Y3S1
DAY: MONDAY
TIME: 2.00 – 5.00 P.M.
DATE: 08/12/2008
INSTRUCTIONS TO CANDIDATES:
Answer All questions in Section A and Any TWO from Section B
PLEASE TURN OVER
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SECTION A (40 MKS)
(Answer all questions)
1. (a) Differentiate between ecophysiology and community ecology. (2 mks)
(b) Differentiate between list count quadrate and chart quadrate. (2 mks)
(c) Explain what an ecosystem is. (1 mk)
(d) Give two examples of man-made ecosystems. (2 mks)
(e) Differentiate between open and cybernetic systems. (2 mks)
2. (a) What is a biotic community. (1 mk)
(b) Briefly describe the relationship between autotrophs and heterotrophs in an
ecosystem. (2 mks)
(c) Differentiate between biotic communities and ecosystems. (2 mks)
3. (a) What is ecosystem development (ecological succession). (2 mks)
(b) Differentiate between pioneers and climax community. (2 mks)
(c) What is secondary secussion. (2 mks)
4. (a) Differentiate between intraspecific and interspecific interactions. (2 mks)
(b) What is the meaning of the following terms;-
(i) Neutralism (2 mks)
(ii) Commensalism (2 mks)
(iii) Amensalism (2 mks)
5. (a) Differentiate between the following;
(i) Gross primary production and net primary production. (2 mks)
(ii) Gross secondary production and net secondary production. (2 mks)
(b) Describe one instance where energy flows from detritus food chain to grazing
food chain. (1 mk)
6. (a) What are biogeochemical cycles. (1 mk)
(b) Name two types of biogeochemical cycles. (2 mks)
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(c) Name two factors which drive hydrologic cycle. (2 mks)
(d) Name two significant sources of oxygen in the atmosphere. (2 mks)
SECTION B (20 MKS)
(Answer any two questions)
7. Describe the characteristics of the various horizontal strata of a deep fresh water lake.
(10 mks)
8. Describe the physicochemical characteristics and biota of tundra biome. (10 mks)
9. Describe the cycling of nitrogen in the ecosystem. (10 mks)
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