How do organism interactions ensure that energy flows through and ecosystem?

Organisms can be either producers or consumers in terms of energy flow through an ecosystem. A trophic level refers to an organism's place in the food chain.

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the solute can move "downhill," from regions of higher to lower concentration, relying on the specificity of the protein carrier to pass through the membrane. this process is called passive transport or facilitated diffusion, and does not require energy.