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Of or pertaining to the change in the genetic composition of a population during successive generations, as a result of natural selection acting on the genetic variation among individuals, and resulting in the development of new species.

Contributors in Evolution



Archaeology; Evolution

A group of simple chordates, including sea squirts (class Ascidacea) that live attached to rocks, and the salps (class Thaliacea) that float in the sea. Tunicates are small marine animals, ...

nitrogen fixation

Archaeology; Evolution

A chemical process by which nitrogen in the atmosphere is assimilated into organic compounds. Only certain bacteria are able to fix atmospheric nitrogen, which then becomes available to other ...

lethal recessive

Archaeology; Evolution

The case in which inheriting two recessive alleles of a gene causes the death of the organism.


Archaeology; Evolution

Groups of organisms, including the Kingdom of fungi that includes molds and fungi. They can exist either as single cells or make up a multicellular organism is called a mycelium. Fungi lack ...

Charles Darwin

Archaeology; Evolution

The 19th-century naturalist considered the father of evolution. His landmark work, On the Origin of Species, published in 1859, presented a wealth of facts supporting the idea of evolution and ...

Erasmus Darwin

Archaeology; Evolution

The name shared by Charles Darwin's grandfather and brother, each important in his life and work. Charles's grandfather Erasmus (1731-1802) was a glorious polymath-physician-author, and botanist. His ...


Archaeology; Evolution

The second-to-lowest category in taxonomic classification. The phrase "species name" generally refers to the genus and species together, as in the Latin name for humans, Homo sapiens. See taxon.

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