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Szl101:Introduction To Ecology And Bionalysis Question Paper

Szl101:Introduction To Ecology And Bionalysis

Course:Bachelor Of Education (Science)

Institution: Kenyatta University question papers

Exam Year:2011

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KENYATTA UNIVERSITY
UNIVERSITY EXAMINATIONS 2011/2012
FIRST SEMESTER EXAMINATION FOR THE DEGREE OF BACHELOR OF SCIENCE
SZL 101: INTRODUCTION TO ECOLOGY AND BIONALYSIS

DATE: Monday 19th November, 2011 TIME: 8.00 a.m. – 10.00 a.m.
_____________________________________________________________________________
INSTRUCTIONS
Answer ALL questions in Section A and any ONE question in Section b. Within a section, all
questions carry equal marks. Illustrate your answers with diagrams and give examples where
appropriate.

SECTION A – Answer ALL questions (40 marks)
1.
Discuss briefly the causes of climate change.
2.
Explain the following terms:

a)
Ecosystem

b)
Niche

c)
Population

c)
Competition
3.
Outline the carbon cycle.
4.
Outline the main groups of phytoplankton.
5.
Distinguish between batesian and mullerian mimicry.
6.
Outline the advantages and disadvantages of living in social groups among the savanna dwellers.
7.
Briefly outline the fate of sun’s energy as it flows through the biosphere.
8.
Outline the scales of measurements in research.
SECTION B – Answer any ONE question (30 marks)
9.
Write an essay on ecological pyramids.
10.
Using an example of a forest ecosystem, discuss the types of data collected and the sampling
techniques.
11.
a)
Distinguish between measures of central tendency and measures of dispersion.

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b)
An area of bog vegetation was surveyed and classified. A series of peat surface samples
was taken and classified according to vegetation type. The peat samples were then
analyzed for the number of nutrient elements. The samples from Cotton Grass Bog gave
the following values for total phosphate, in mg 100g-1 dry weight.
39.3
46.6
51.7
46.0
68.3
58.0
54.5
62.4
56.0
48.2
43.1 50.3

Compute the mean value and attach the 95 and 99% confidence limits.

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Szl101:Introduction To Ecology And Bionalysis Question Paper

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