Zool 220 Question Paper
Zool 220
Course:Bachelor Of Education Science
Institution: Kabarak University question papers
Exam Year:2008
INSTRUCTIONS:
1. ANSWER ALL QUESTIONS IN SECTION A AND TWO IN
SECTION B
SECTION A.
1. Giving examples, differentiate between co-evolution and competitive exclusion
(8mks)
2. Give an outline of the ecosystem structure (8mks)
3. Briefly describe the random and the systematic methods of sampling (6mks)
4. Give a brief description of the following terms:
i. Species richness (3mks)
ii. Species diversity (3mks)
5. Outline the salient differences between food chains and food webs (4mks)
6. Briefly describe the Phosphorus Cycle (8mks)
SECTION B
7. Describe the role of biotic factors in ecosystems (15mks)
8. Discuss the influence of man on terrestrial ecosystems (15mks)
9. Discuss the reasons that necessitate the conservation of natural resources (15mks)
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