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Zool 210: Ecology Question Paper

Zool 210: Ecology

Course:Bachelor Of Environmental Science

Institution: Chuka University question papers

Exam Year:2013

CHUKA

UNIVERSITY

UNIVERSITY EXAMINATIONS
SECOND YEAR EXAMINATION FOR THE AWARD OF DEGREE OF
BACHELOR OF SCIENCE (ENVIRONMENTAL SCIENCE) BACHELOR OF EDUCATION (SCIENCE) AND BACHELOR OF SCIENCE

ZOOL 210: ECOLOGY

STREAMS: BSC, BSC (ENSC) & BED (SCI) TIME: 2 HOURS

DAY/DATE: FRIDAY 9/8/2013 8.30 AM-10.30 AM
INSTRUCTIONS:

• Answer ALL Questions in Section A and any other TWO Questions from Section B
• Illustrate your Answers with diagrams where appropriate.

Section A (30 Marks)

1. Explain meaning of the following terms:-

(i) Ecotone
(ii) Species Diversity
(iii) Ecological Niche
(iv) Biosphere [4 marks]

2. Describe main features of grazing and detritus food chains. [4 marks]

3. Distinguish between density dependent and density independent factors that influence growth and regulation of population citing appropriate examples. [6 marks]

4. (a) Differentiate between macro and micronutrients in reference to plants. [1 mark]

(b) Describe and illustrate the nitrogen cycle. [4 marks]

5. Write explanatory notes on the following concepts

(i) Ecological pyramids
(ii) Survivorship curves
(iii) Planktonic communities [6 marks]
6. Compare and contrast the r and k natural selection strategies. [5 marks]

Section B: (40 Marks): Answer any two questions from this section

7. Discuss various interspecific and intraspecific associations in the biosphere and state their significance. [20 marks]

8. (a) Explain what a climax community is. [5 marks]

(b) Describe the processes involved in attainment of a climax community in named ecosystem. [15 marks]

9. Discuss the impacts of climate change and state the possible mitigation strategies.
[20 marks]
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Zool 210: Ecology Question Paper

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