Alternatively, production is P = I - F - R. Most energy flow diagrams in textbooks show production flowing from one trophic level into another. In reality, however, production is a growth process ...

Each food chain is a descriptive diagram including a series of arrows, each pointing from one species to another, representing the flow of food energy from one feeding group of organisms to another.

Cells close cellCells provide energy which enables electrons to flow through wires and components ... devices such as a calculator. This circuit diagram shows the same circuit, but uses circuit ...