Cellularization

In evolutionary biology, the term cellularization (also spelled cellularisation) has been used in theories to explain the evolution of cells from non-cellular components, for instance in the pre-cell theory, dealing with the evolution of the first cells on Earth, and in the syncytial theory, which attempts to explain the origins of multicellular Metazoa from simpler unicellular organisms.

Processes of cell development in multinucleate cells (known as syncytia) of animals and plants are also termed cellularization, often called syncytium cellularization.

Early diversification of life with Kandler's pre-cell theory.

      Key:
1. Reductive formation of organic compounds from CO or CO
2 by methyl-sulfur coordination chemistry.
2. Tapping of various redox energy sources and formation of primitive enzymes and templates.
3. Elements of a transcription and translation apparatus and loose associations.
4. Formation of pre-cells.
5. Stabilised circular or linear genomes.
6. Cytoplasmic membranes.
7. Rigid murein cell walls.
8. Various rigid non-murein cell walls.
9. Glycoproteinaceous cell envelope or glycocalyx.
10. Cytoskeleton.
11. Complex chromosomes and nuclear membrane.
12. Cell organelles via endosymbiosis.

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