منابع مشابه
A new Pattern Systematics
Software patterns are a great aid in designing the architecture of application systems. They provide standard solutions for frequently occuring problems. This paper introduces a new schema for systematizing patterns. It arose from firstly, the investigation of a whole spectrum of different patterns and secondly, the application of the principles of human thinking to the classification of these ...
متن کاملPhylogenetic systematics turns over a new leaf.
Long restricted to the domain of molecular systematics and studies of molecular evolution, likelihood methods are now being used in analyses of discrete morphological data, specifically to estimate ancestral character states and for tests of character correlation. Biologists are beginning to apply likelihood models within a Bayesian statistical framework, which promises not only to provide answ...
متن کاملMolecular systematics of New World suboscine birds.
Phylogenetic relationships among New World suboscine birds were studied using nuclear and mitochondrial DNA sequences. New World suboscines were shown to constitute two distinct lineages, one apparently consisting of the single species Sapayoa aenigma, the other made up of the remaining 1000+ species of New World suboscines. With the exception of Sapayoa, monophyly of New World suboscines was s...
متن کاملMetagenomics and beyond: new toolboxes for microbial systematics
An extraordinary DNA sequencing revolution has taken place over the past decade, which has seen exciting, yet challenging times for microbial genomics and systematics. Numerous metagenomics and metatranscriptomics projects have provided us with an unprecedented glimpse at the vast biological diversity that exists in minute amounts of samples obtained from environments such as ocean water, soil ...
متن کاملPlatyhelminth systematics and the emergence of new characters.
Since the inclusion of molecular data in modern phylogenetic analyses, significant progress in resolving the origins and radiation of flatworms has been made, although some key problems remain. Here I review developments in the supply and use of systematic characters that provide the basis for diagnosis and phylogeny reconstruction, that in turn have driven systematic revisions and the interpre...
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ژورنال
عنوان ژورنال: Nature
سال: 1951
ISSN: 0028-0836,1476-4687
DOI: 10.1038/1681096a0