Protozoans are organized at the protoplasmic level, which means that all functions necessary for life are performed within a single cell. They represent the simplest form of biological organization, as opposed to multicellular organisms that have tissue and organ levels. Their complexity lies in the specialized structures within that single cell. ;
Protozoans display the protoplasmic level of body organization, meaning all life functions occur within a single cell. This makes them the simplest form of biological organization. Unicellular and functionally complex, protozoans perform necessary life processes using specialized structures within one cell.
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