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03-06-2018
Biology

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The transport of substances across a cell membrane with the aid of a carrier molecule and the expenditure of energy is

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ComDest ComDest

03-06-2018

Passive diffusion. This is a process that does not require energy & usually follows a concentration gradient for smaller substances.

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Historical sources can contain bias or points of view. People's beliefs and values affect their perspectives. New information can affect previous understandings