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| Sluys, Ronald. |
| Many of the lower metazoans reach adulthood via complex developmental stages. Each of these stages is described with a specialized terminology, which is different for every major group of organisms. Biologists with a proper training in biodiversity may have learned about these complex issues during their undergraduate days, but many of us do no longer encounter the intricacies of lower metazoan development in later stages of our careers. We may be familiar with the ontogenetic stages in the group on which we specialize, but only a few will have practical knowledge and an overview of the larval stages in such groups as crustaceans, echinoderms, polychaetes, sipunculans, molluscs, flatworms, bryozans, and nemertines. Donald Williamson certainly belongs to... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Ontogeny; Larvae; Evolutionary theory; Parallelism; Homology. |
| Ano: 1992 |
URL: http://www.repository.naturalis.nl/record/504508 |
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| Tisdell, Clement A.. |
| Relationships between bounded rationality and transaction cost theories are discussed and their connections with stochastic theories of industrial evolution are considered. While these theories have their limitations, they are useful but have been ignored in many public policy prescriptions, especially those involving markets. For example, as discussed, these theories have failed, on the whole, to influence competition policy and the design of more efficient systems for public administration (contracting out, labour contracts for public employment, adoption of the user-pays principle and use of performance budgeting and accounting), as well as in policies to remove market frictions. The result may be less efficient systems than otherwise achievable and... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Bounded rationality; Competition policy; Evolutionary theory; Market dynamics; Public administration; Transaction costs; Public Economics; D23; H11; I20. |
| Ano: 2004 |
URL: http://purl.umn.edu/90531 |
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| GALLARDO,MILTON. |
| Genome data analysis indicates that the major evolutionary transitions have been driven by substantial increases in genomic complexity. These increases, accounting for novelty in evolution, have proceeded mainly by gene duplication. This idea, advanced by <A HREF="#OHNO">Ohno (1968)</A>, remains current in the study of several organisms whose genomes have been sequenced. Maize, yeast, and humans contain more paralogons than would be expected to occur by chance, and this supports the contention that gene families were not formed de novo, but by large-scale DNA duplications. Lineage hybridization emerges as an efficient and widespread mechanism to create evolutionary novelty by recruiting redundant genes to new roles. Lateral gene transfer... |
| Tipo: Journal article |
Palavras-chave: Gene duplication; Genome; Genetics; Evolution; Macroevolution; Evolutionary theory. |
| Ano: 2003 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2003000400013 |
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