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| a theory that evolution of a species is due to a predetermined series of alterations intrinsic to the species, not due to natural selection |
| the close external resemblance of an organism to some different organism, such that it benefits from mistaken identity, as seeming to be unpalatable |
The kingdom of single-celled organisms without a cell nucleus (see also prokaryotes). Monera are the most primitive living things and are thought to have been the first to evolve.
Monera
any of the prokaryotes (bacteria and archaea), constituting the kingdom Monera.
Learn more about Monera with a free trial on Britannica.com.