Define photosynthesis, respiration, the levels of ecological organization, the two major parts of the environment, and state the primary formation of sulfur dioxide.

Here are the solutions to your questions: QUESTION 1 Define: (i) Photosynthesis: The process by which green plants, algae, and some bacteria convert light energy into chemical energy*, producing glucose (food) and oxygen from carbon dioxide and water. (ii) Respiration: The process by which living organisms break down glucose to release energy* for metabolic activities, typically consuming oxygen and producing carbon dioxide and water. QUESTION 2 The levels of ecological organization from smallest to largest are: 1. Individual organism 2. Population 3. Community 4. Ecosystem 5. Biosphere QUESTION 3 The two major parts of the environment are: (i) Biotic factors* (living components) (ii) Abiotic factors* (non-living components) QUESTION 4 Sulphur dioxide (SO_2) is primarily formed when sulphur-containing fuels such as coal and oil are burned. It can also be released naturally during volcanic eruptions. The chemical reaction for its formation from sulphur and oxygen is: S + O_2 SO_2