Information om | Engelska ordet ANAGENESIS

Exempel på hur man kan använda ANAGENESIS i en mening

• Cook coined the term in 1906 for cladogenesis, the splitting of lineages, as opposed to anagenesis, phyletic evolution within lineages.
• Cladogenesis is in contrast to anagenesis, in which an ancestral species gradually accumulates change, and eventually, when enough is accumulated, the species is sufficiently distinct and different enough from its original starting form that it can be labeled as a new form - a new species.
• Cladogenesis can be seen as a similar hypothesis to anagenesis, with the addition of speciation to its mechanisms.
• Catagenesis (biology), archaic term from evolutionary biology meaning retrogressive evolution, as contrasted with anagenesis.
• In 1888, Gulick introduced new terms for two patterns of evolution that can be observed: the term monotypic evolution (previously called "transformation;" today "anagenesis") and the term "polytypic evolution" (previously called "diversification"; today "cladogenesis") – simultaneous processes, such as the multiplication of species, manifested by different populations and incipient species.
• The authors concluded that this meant the variation present within these species made it difficult to find any real resolution among them, and may even provide support for the hypothesis that centrosaurines evolved primarily via anagenesis (a single lineage changing through time) rather than cladogenesis (multiple branching lineages with shared common ancestors).
• During anagenesis (evolution, not necessarily involving branching), some palaeontologists seek to identify a sequence of species, each one derived from the phyletically extinct one before through continuous, slow and more or less uniform change.

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