AP BIOLOGY

Detailed explanation-1: -Sunlight allows plants, algae and cyanobacteria to use photosynthesis to convert carbon dioxide and water into organic compounds like carbohydrates. This process is the fundamental source of organic material in the biosphere.

Detailed explanation-2: -This is because nitrogen, just like many elements, moves across the earth in a matter cycle; the nitrogen cycle. The most important cycles of matter will be described here; those of water, nitrogen, phosphorus, sulphur and carbon.

Detailed explanation-3: -Sometimes called nutrient cycles, material cycles describe the flow of matter from the nonliving to the living world and back again. As this happens, matter can be stored, transformed into different molecules, transferred from organism to organism, and returned to its initial configuration.

Detailed explanation-4: -Cycles of matter are called biogeochemical cycles, because they include both biotic and abiotic components and processes. Components that hold matter for short periods of time are called exchange pools, and components that hold matter for long periods of time are called reservoirs.

Detailed explanation-5: -The cycling of matter. Because there are only finite amounts of nutrients available on the earth, they must be recycled in order to ensure the continued existence of living organisms.