This isn&#x27;t true. Prokaryotes do not have membrane-bound organelles resulting from an ancestral symbiotic relationship.<p>(You might be able to found some weird exception to the rule out here. This is a generalization -- nothing in biology shocks me anymore.)<p>Even for unicellular eukaryotes, it would be incorrect to claim they&#x27;re separate organisms from their membrane-bound organelles just because of the organelle&#x27;s evolutionary origin.<p>Unicellular organisms really are &quot;unitary.&quot;<p>Edit: A biologist should always be humble. I just thinking of lichens, which are &quot;composite organisms&quot; consisting of fungi, bacteria, and algae, which can be an instance of what you&#x27;re getting at. Still, <i>some</i> organisms really are &quot;unitary.&quot;