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The term sister group is used in phylogenetic analysis, however, only groups identified in the analysis are labeled as "sister groups".. An example is birds, whose commonly cited living sister group is the crocodiles, but that is true only when discussing extant organisms; [3] [4] when other, extinct groups are considered, the relationship between birds and crocodiles appears distant.
sister taxon; zombie taxon; polyphyletic taxon; monophyletic taxon: a taxon consisting of a common ancestor and all its lineal descendants; a clade; paraphyletic taxon; species complex: a group of closely related species very similar in appearance, generally constituting a monophyletic taxon
In biology, a species complex is a group of closely related organisms that are so similar in appearance and other features that the boundaries between them are often unclear. The taxa in the complex may be able to hybridize readily with each other, further blurring any distinctions.
This glossary of biology terms is a list of definitions of fundamental terms and concepts used in biology, the study of life and of living organisms.It is intended as introductory material for novices; for more specific and technical definitions from sub-disciplines and related fields, see Glossary of cell biology, Glossary of genetics, Glossary of evolutionary biology, Glossary of ecology ...
Madison is also trying to plan a family reunion in the Dominican Republic, so Buonaguirio can meet his biological father and the seven siblings who live there. Someday, he says, he will probably ...
adopted siblings find out they are biological siblings (Courtesy Angela Laffin) Today, Victoria is a 19-year-old college student studying psychology and creative writing.
In biological phylogenetics, a clade (from Ancient Greek κλάδος (kládos) 'branch'), also known as a monophyletic group or natural group, [1] is a grouping of organisms that are monophyletic – that is, composed of a common ancestor and all its lineal descendants – on a phylogenetic tree. [2]
The woman who got the ball rolling when she found out Madison was her cousin has now also found out that she has a long-lost biological sister of her own, a twin living just 40 minutes away from ...