Morphological

Morphological and biochemical alterations have been described in neurons of the aged human brain. However, the cell death process associated with neuronal senescence remains to be elucidated. Apoptosis and autophagic degeneration, ...

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... at the molecular level fail to demonstrate the expected correspondence between genome and phenotype. The most spectacular example of this is the morphological dissimilarity between human being and chimpanzee despite a 98.7% similarity in their DNA [9]. Although evolutionary biologists speak of ...

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simply morphological observation.

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Do you seek cell division cycle diagrams (as in S, G1, etc) or simply the morphological observations?

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Probably because it 1. Is gigantic for a bacterial cell. 2. Has strange morphological features, like invaginations, vesicles, and tubules. 3. Reproduces strangely. It was found to be bacterial after rRNA sequencing. http://www.nature.com/nature/journal/v362/n6417/abs/362239a0.html

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