28
(a) Contamination of water
(b) Identification
of polluted water (c) Wastewater treatment
2. Biology and fishing industry
(a) Fish stock management
(b)
Fish farming 3. Biology and food industry
Food additives
4. Biology and agriculture
5. Biotechnology Explanation of the term Recombinant DNA Technology and state its application. Candidates should carryout experiments to test water samples for bacterial contamination. The use of Biological Oxygen Demand BOD) in the measurement of the level of organic pollution in water. Description of biological processes of purifying sewage. Cesspit activated sludge process should be mentioned. Explanation of why fish is an efficient converter of plankton into flesh. Description of ways of conserving fish stocks in water bodies. Importance offish farming. Advantages and disadvantages offish farming. Explanation of the term food additives. Identification of the categories of food additives (Naturally occurring and artificial food additives. Health implications in the use of food additives. Explanation of the biological
principles by which fertilizer, pesticides, selective breeding, resistance to disease and irrigation can respectively lead to successful agriculture. Explanation of the concept of biotechnology. The use of microorganisms in the