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Zool 311:Fresh Water Biology Question Paper

Zool 311:Fresh Water Biology

Course:Bachelor Of Education Science

Institution: Chuka University question papers

Exam Year:2014

INSTRUCTIONS:
? ANSWER ALL QUESTIONS IN SECTION A AND ANY OTHER ONE IN SECTION B. ? USE ILLUSTRATIONS WHERE APPROPRIATE TO ENHANCE YOUR ANSWERS.
1. (a) Explain briefly how the following properties of water relate to the existence of organisms in aquatic systems:
(i) density [4 marks]
(ii) specific heat [4 marks]
(b) Define the following terms:
(i) relative depth (ii) shoreline development (iii) production (v) aufwuchs (vi) sewage sludge
2. With examples, give a summary of the river continuum concept. [6 marks]
3. Describe lake formation by the following methods:
(a) volcanic activity [5 marks]
(b) river activity [5 marks]
2
4. Describe the adaptation of floating-leaved macrophytes for survival in the freshwater ecosystem. [10 marks]
5. Describe the method used to evaluate the transparency of water to light in a lake and the principle behind it. [10 marks]
6. (a) State the composition of detritus. [2 marks]
(b) Give three natural methods by which groundwater is recharged. [4 marks]
SECTION B (20 MARKS)
7. Describe summer stratification of lakes and how it is eventually lost. [20 marks]
8. Expound on lacustrine zonation and the kind of biota occurring in each zone. [20 marks]
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Zool 311:Fresh Water Biology Question Paper

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