Environmental Biology Question Paper

Environmental Biology

Course:Bachelor Of Environmental Studies

Institution: Kenyatta University question papers

Exam Year:2009

KENYATTA UNIVERSITY
UNIVERSITY EXAMINATIONS 2009/2010
FIRST SEMESTER EXAMINATION FOR THE DEGREE OF BACHELOR OF
ENVIRONMENTAL SCIENCE
ENS 132: ENVIRONMENTAL BIOLOGY

DATE: TUESDAY, 29TH DECEMBER 2009

TIME: 8.00 A.M. - 10.00 A.M.

INSTRUCTIONS:
Answer question ONE and any other THREE.
Illustrate your answers with diagrams where necessary.

1.
a)
Differentiate between the following:
(i)
Histology
and
Ecology

(ii)
Monosaccharides and Poly saccarides

(iii)
The cell and the tissue
iv)
Xylem
and
Phloem

v)
Wood fibres and wood parenchyma

(10 marks)

b)
Draw labelled diagrams of the followings:
i)
A
plant
cell
ii)
Bicollateral
vascular
bundle
iii)
Transection
of
Dicot
sterm
iv)
A
mitochondrion
v)
The
simple
microscope

(15 marks)

2.
Explain the four most important classes of polymers found in protoplasm. (15 marks)

Page 1 of 2

3.
Briefly explain and state the functions of each of the following cellular components;
i)
Deoxy-ribonucleic
acid
ii)
Ribosomes
iii)
Stomata
iv)
Nuclear
membrane
v)
Protoplasm

(15 marks)

4.
a)
Distinguish between Biotic and A. Biotic Environmental factors.

b)
Using an example, explain, how do environmental factors relate to
environmental
problems.

(10 marks)

5.
“Predator - Prey relationship is beneficial to the environment”. Discuss. (15 marks)

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