Konstantin Mereschkowski
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Konstantin Sergeevich Mereschkowski was a Russian biologist and botanist, active mainly around Kazan, whose research on lichens led him to propose the theory of symbiogenesis - that larger, more complex cells evolved from the symbiotic relationship between less complex ones.
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![Mereschkowski's tree-of-life diagram, showing the origin of complex life-forms by two episodes of symbiogenesis, the incorporation of symbiotic bacteria, 1905[11]](https://upload.wikimedia.org/wikipedia/commons/thumb/1/1a/Konstantin_Mereschkowski_Symbiogenesis_Tree_of_Life.jpg/330px-Konstantin_Mereschkowski_Symbiogenesis_Tree_of_Life.jpg?utm_source=en.wikipedia.org&utm_campaign=parser&utm_content=thumbnail)
In their orbit 1
Scientists born in the 1850s 6
About this person
Konstantin Sergeevich Mereschkowski was a Russian biologist and botanist, active mainly around Kazan, whose research on lichens led him to propose the theory of symbiogenesis - that larger, more complex cells evolved from the symbiotic relationship between less complex ones. He presented this theory in 1910, in his work, The Theory of Two Plasms as the Basis of Symbiogenesis, a New Study of the Origins of Organisms, although the fundamentals of the idea had already appeared in his earlier 1905 work, The nature and origins of chromatophores in the plant kingdom.
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