An ecological community of organisms that live in a particular area, along with their nonliving environment community
population
ecosystem

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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.

the dali lama

explanation:

he is quite fat and then we can talk about the details