Cellular respiration requires fuel (glucose) and oxygen gas. the main process that produces these inputs is

Cellular respiration requires fuel (glucose) and oxygen gas. The main process that produces these inputs is the Photosynthesis. Photosynthesis is the process by which green plants make their own food by use of sunlight to produce simple sugars and oxygen gas. Respiration is the process that uses energy to produce energy to the cell.

An ecosystem is in a certain area and includes living and non living plus there is weather conditions and a biome is a large amount of area with similar climate.so ecosystem is based on weather and biome is based on the average climate