Environmental Ecology 1 Question Paper

Environmental Ecology 1

Course:Bachelor Of Science (Water & Environmental Engineering)

Institution: Kenyatta University question papers

Exam Year:2010

KENYATTA UNIVERSITY
UNIVERSITY EXAMINATIONS 2008/2009
INSTITUTE OF OPEN LEARNING EXAMINATION FOR THE DEGREE OF
BACHELOR OF SCIENCE IN WATER AND ENVIRONMENTAL ENGINEERING

SET 423 – ENVIRONMENTAL ECOLOGY I
DATE: Wednesday 17th February 2010

TIME: 11.00 a.m -1.00 p.m

INSTRUCTIONS
Attempt Question ONE and any other TWO questions.
QUESTION ONE
a)
Define ecology and state its importance.
b)
Differentiate between Abiotic and Biotic factors as used in ecology and list the components of each factor.
c)
With the aid of a diagram explain atmospheric nitrogen cycle.
[30 marks]

QUESTION TWO
Differentiate the following as used in ecology.
a)
Population ecology and community ecology.
b)
Landscape ecology and evolutionary ecology
c)
System ecology and ecosystem.
d)
Organismal ecology and Behavioral ecology
[20 marks]

QUESTION THREE
a)
Discuss food chain and food web giving examples. [10 marks]
b)
Discuss predation and competition as used in ecology. [10 marks]

QUESTION FOUR
a)
Define aquatic ecosystem and outline the two main types of aquatic ecosystems. [10 marks]
b)
Discuss any two biogeochemical cycles. [10 marks]

QUESTION FIVE
a)
Discuss Natural Selection
b)
Discuss the following sub topics as outlined in the law of Natural selection.
i)
Some take selection to mean survival for the fittest. Sometime this slogan may led to misconception. Discuss
ii)
Natural selection provides predictability.
iii)
Evolution involves unpredictable chance.
[30 marks]

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