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Set 523 Question Paper

Set 523

Course:Bachelor Of Science In Environmental Engineering

Institution: Kenyatta University question papers

Exam Year:2010

KENYATTA UNIVERSITY
UNIVERSITY EXAMINATIONS 2009/2010
OPEN, DISTANCE AND E-LEARNING EXAMINATION FOR THE DEGREE
OF BACHELOR OF SCIENCE
(WATER AND ENVIRONMENTAL ENGINEERING)

SET 523: ENVIRONMENTAL ECOLOGY II

DATE: Wednesday 21st July 2010 TIME: 11.00a.m – 1.00p.m

INSTRUCTIONS
Attempt question ONE and any other TWO questions.
Question One

a)
Discuss fresh water ecosystem
b)
Using diagrams where necessary discuss the following terms as used in ecology

i)
Littoral zone

ii)
Limnetic zone

iii)
Profundal zone

iv)
Fall overturn.

[30marks]

Question Two
Giving examples explain five density factors that limit population growth. [20marks]

Page 1 of 2
Question Three
a)
Outline four factors that have led to the development of adaptations in aquatic

Species.

b)
Discuss the following terms.

i)
Community succession and

ii)
Primary Succession.

iii)
Secondary Succession and

iv)
Climax community.

[20marks]

Question Four
a)
Define the term Population giving three ways of environment that favour the

Maintenance of population of any organism.

Question Five
By use of graphs describe
i)
Exponential (Unrestricted) growth.
ii)
Logistic (restricted) growth.

[20marks]

Page 2 of 2

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