When Schwann heard about the nucleus, he realized that he had seen a similar structure in the vertebrate notochord—a rodlike structure in the embryo that develops into the spinal column. Sure enough, ...

In 1853, Thomas Henry Huxley noted a similar inconsistency between the structure of some tissues and the German cell theory of his day. Huxley was convinced that cells of multicellular organisms ...

II. THE continued investigations into the structure of cells, both in plants and animals, led to modifications in the conception of their morphology. Hugo von Mohl announced that he had discovered ...

Known as the “inside-out” theory of eukaryotic cell evolution, the alternative view of how complex life came to be was published recently (Oct. 28, 2014) in the open access journal BMC Biology.