Biomes are major groupings of plant and animal communities that are defined by

Use the drop-down menu to match the following definitions to the corresponding terms. the total variety of organisms that live in the biosphere a group of organisms that breed and produce offspring that can breed all of the biotic and abiotic factors in an area

An easy way to calculate the amount of energy available at each level is to what?

Which process of living things produces water that enters the water cycle