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the process whereby certain substances are removed from a liquid and others retained, due to differences in their ability to pass through a semi-permeable membrane. Kidney dialysis is the medical procedure whereby a person's blood can be purified by passing it through a dialysis machine.
the right and left halves of bilaterally symmetrical organisms are mirror images of each other...
the process in which micro-organisms, such as yeast, convert sugars into alcohol under anaerobic...
undifferentiated cells found in almost all organisms that have the ability to develop into any...
when a person uses their breath to help another person who has stopped breathing, in an attempt...