Nanagibson4891 Nanagibson4891

03-08-2017
Biology

contestada

_____ systems have a membrane that separates the internal chemicals from the external chemical environment.

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andriansp andriansp

09-08-2017

Living systems have a membrane that separates the internal chemicals from the external chemical environment.

Living organism has to keep their internal chemical level so they need to make a membrane that separates it from the external chemical environment.

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