His widespread influence and activity, both in Ismel and more genemlly, as a leading evolutionary biologist is indicated by his many co-authors on books and papers, and byhis many students integmted in teaching and research. Sensible publishers, and indeed readers, reflexively flinch from Festschrifts, which too often are well-intentioned but inchoate collections of papers frequently recycled. This particular collection, however, is unified by the way the editors have built on Eibi's own work, to provide a connective narrative and synthesis, much ofwhich is new material.
The unifYing thread is evolutionary theory. As a result of recent advances at the interface between molecular and organismal biology, evolutionary theory is currently undergoing one of its most dynamic and dramatic developments, unravelling the origins, structure and evolution ofliving organisms. Over the past four decades, studies ofthe causes and consequences of biological diversity at every level - genes, genomes, populations, species, ecosystems, - have revolutionised evolutionary biology.
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New perspectives in ecological dynamics and in molecular biology and in diversity, along with complete sequencing ofthe first prokaryote and eukaryote genomes, highlight the evolutionary origins and relationships which underlie the unity and diversityoflife onour small planet. Speciation Patters in Predominately Selfpollination Annuals. At the Worlds Cross Roads. Polyploidy — the condition in which the number of chromosomes is an integral greater than two of the haploid numbers.
Biological species concept BSC — defines species as groups of interbreeding natural populations that are reproductively genetically isolated from other such groups. Allopatric speciation — the evolution of a population into a separate species involving a period of geographic isolation. The full text of this article hosted at iucr. If you do not receive an email within 10 minutes, your email address may not be registered, and you may need to create a new Wiley Online Library account.
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View Preview. Learn more Check out. Abstract Chromosomal speciation is one of the major modes of the origin of new species through the splitting of preexisting species.
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Key Concepts: Speciation — the evolutionary process leading to the multiplication of species and generating biodiversity. The evolutionary divergence of a single phyletic line into different niches or adaptive zones. Citing Literature. Related Information. Close Figure Viewer.
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