QUESTION 1 [28] 1.1. 1.2. What is the ecosystem? 1.3. Critically discuss 4 fundamental elements of the ecosystem, provide examples. (8) Describe 4 properties of a well-developed soil. (8) 1.4. Explain five factors that help in the formation of soil in the ecosystem. (10) [25] (2) QUESTION 2 2.1. Elucidate is symbiosis? 2.2. Discuss 3 different symbiotic relations and demonstrate how they occur? 2.3. What is the difference between autotrophic and heterotrophic organisms? 2.4. What are the 5 major vegetation regions mostly found in the ecosystem? 2.5. State your reasons why do you think humans affect ecosystem/biosphere? QUESTION 3 3.1 Give clear descriptions of the following geographical concepts:- a. Ecology c. Biome b. Ecosystem [20] e. Niche g. Organism i. Community d. Habitat f. Evapotranspiration h. Population j. Biomass (20) QUESTION 4 4.1. What is a natural resource? [37] 4.2. Explain 3 (three) characteristics of natural resources. Use Dahlman et al. 1.3 What do you understand by the term, substitutability. 20 (3) 4.4. Demonstrate by examples how substitutability can be applied in the geographic and economic circles. (10) 4.5. Describe by relevant examples, what are renewable and non-renewable resources. (6) 4.6. Name and explain 5 energy resources that are important in the ecosystem. (10)
