Cladogenesis is an evolutionary splitting event in which each branch and its smaller branches is a "clade"; an evolutionary mechanism and a process of adaptive evolution that leads to the development of a greater variety of animals or plants.
Cladogenesis is often contrasted with the process entitled "Anagenesis", where gradual changes lead to the development of a new species with the replacement of the old species (i.e: there is no "Splitting" of the Phylogenetic tree.). Anagenesis is the progressive evolution of species involving a change in gene frequency in an entire population rather than a cladogenetic branching event. ... A phylogenetic tree is a tree showing the evolutionary interrelationships among various species or other entities that are believed to have a common ancestor. ...
Categories: Biology stubs | Evolutionary biology Evolutionary biology is a subfield of biology concerned with the origin and descent of species, as well as their change over time, i. ... Charles Darwin, the father of evolutionary theory Although generally, evolution is taken to mean any process of change over time, in the context of life science, evolution is a change in the traits of living organisms over generations, including the emergence of new species. ... Macroevolution is the concept that evolution of species and higher taxa is the result of large-scale changes in gene-frequencies over time. ... Microevolution is the occurrence of small-scale changes in gene frequencies in a population over a few generations, also known as change at or below the species level. ... Speciation refers to the appearance of a new species of life on earth, particularly as seen in the fossil record. ... For computer science algorithms that find the kth smallest number in a list, see selection algorithm. ... Genetic drift is a mechanism of evolution that acts in concert with natural selection to change the characteristics of species over time. ... Gene flow (also known as gene migration) is the transfer of genes from one population to another. ... This article is about mutation in biology, for other meanings see: mutation (disambiguation). ... Anagenesis is the progressive evolution of species involving a change in gene frequency in an entire population rather than a cladogenetic branching event. ... Catagenesis refers to forms of evolution that are retrogressive. ... Charles Darwin, about the same time as the publication of The Origin of Species. ... The 1859 edition of On the Origin of Species First published in 1859, The Origin of Species (full title On the Origin of Species by Means of Natural Selection, or the Preservation of Favoured Races in the Struggle for Life) by British naturalist Charles Darwin is one of the pivotal... The modern evolutionary synthesis (often referred to simply as the modern synthesis), neo-Darwinian synthesis or neo-Darwinism, brings together Charles Darwins theory of the evolution of species by natural selection with Gregor Mendels theory of genetics as the basis for biological inheritance. ... Population genetics is the study of the distribution of and change in allele frequencies under the influence of the four evolutionary forces: natural selection, genetic drift, mutation and migration. ... Ecological genetics is the study of genetics (itself a field of biology) from an ecological perspective. ... Human evolution is a multidisciplinary scientific inquiry which seeks to understand and describe the origin and development of humanity. ... Molecular evolution is the process of the genetic material in populations of organisms changing over time. ... Phylogenetics (Greek: phylon = race and genetic = birth) is the taxonomical classification of organisms based on how closely they are related in terms of evolutionary differences. ... Systematics is the study of the diversity of organism characteristics. ... Evolutionary developmental biology (often referred to as evo-devo or evolution of development) is a field of biology that compares the developmental processes of different animals in an attempt to determine the ancestral relationship between organisms and how developmental processes evolved. ... This is a list of topics in evolutionary biology and evolution. ... This timeline outlines the major events in the development of life on planet Earth. ...
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