| http://www.w3.org/ns/prov#value | - Despite such techniques, however, the absence of any method for sectioning meant that it was not possible to look at a cross-section of a cell???s surface membrane, to examine the relation of the nucleus to the cytoplasm, to compare the submicroscopic morphology of different cell types or to hope to define the macromolecular structure of such organelles as mitochondria or the Golgi apparatus.
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