Aquatic ecology and Biodiversity

Unit 6- Biogeochemical cycles

6.1.3. Carbon and oxygen cycles
Carbon occurs in all living organisms in the forms of carbon dioxide, carbohydrates (sugars and starches), proteins and fats. Oxygen occurs in all living organisms in the forms of oxygen gas, water, carbon dioxide, carbohydrates, proteins and fats. Photosynthesis and respiration helps in cycle of oxygen and carbon dioxide in nature.