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Ens 230: Principles Of Environmental Ecology Question Paper

Ens 230: Principles Of Environmental Ecology

Course:Bachelor Of Environmental Studies

Institution: Kenyatta University question papers

Exam Year:2011

DATE: Friday, 25th November, 2011

TIME: 8.00 a.m. – 10.00 a.m.
------------------------------------------------------------------------------------------------------------
INSTRUCTIONS:
1.
Answer question ONE and any other THREE.
2.
Illustrate your answers with suitable examples, diagram and figures wherever
appropriate.
Q.1
a)
Explain briefly the laws of thermodynamics and how they relate to

ecology.

(10 marks)

b)
Discuss global climate change and its impact on Ecosystems as a man

made phenomena and suggest measures to reverse the trend

(15 marks)
Q.2
a)
Explain briefly various types of ecological production in ecosystems

(5 marks)

b)
Compare net primary production in various world ecosystems and explain

why such variation occurs

(10 marks)
Q.3
Describe food chain and food web. Using examples, discuss energy flow through
two food chains.

(15 marks)
Q.4
a)
Discuss the nitrogen cycle

(10 marks)

b)
Explain the impacts of human activities on the Nitrogen Cycle.

(5 marks)
Q.5
Discuss the role of mutualism in different ecosystems.

(15 marks)

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