Life Sciences Commons^™

Morfología Y Moléculas: Bases Complementarias De La Sistemática Moderna, Rafael O. De Sá, David M. Hillis

Biology Faculty Publications

RESUMEN

El auge de las técnicas moleculares en las últimas dos décadas ha traído nuevos enfoques en los estudios sistemáticos. Aquí presentaremos una revisión del uso, las aplicaciones, y los problemas de las principales metodologías de trabajo. Cada una de estas técnicas es aplicable a algunos problemas e inapropiada para otros, y es importante entender las suposiciones y limitaciones de cada técnica. Concluimos que el uso combinado de los enfoques morfológicos y moleculares otorga mejor resolución a los problemas sistemáticos.

ABSTRACT

The development of molecular techniques during the last two decades has brought new approaches to the analysis of systematic …

Mitochondrial Dna Sequence Divergence Among Meloidogyne Incognita, Romanomermis Culicivorax, Ascaris Suum, And Caenorhabditis Elegans, Thomas O. Powers, T. S. Harris, B. C. Hyman

Department of Plant Pathology: Faculty Publications

Mitochondrial DNA sequences were obtained from the NADH dehydrogenase subunit 3 (ND3), large rRNA, and cytochrome b genes from Meloidogyne incognita and Romanomermis culicivorax. Both species show considerable genetic distance within these same genes when compared with Caenorhabditis elegans or Ascaris suum, two species previously analyzed. Caenorhabditis, Ascaris, and Meloidogyne were selected as representatives of three subclasses in the nematode class Secernentea: Rhabditia, Spiruria, and Diplogasteria, respectively. Romanomermis served as a representative outgroup of the class Adenophorea. The divergence between the phytoparasitic lineage (represented by Meloidogyne) and the three other species is so great that virtually …

Where Environmental Law And Biology Meet: Of Pandas' Thumbs, Statutory Sleepers, And Effective Law, William H. Rodgers, Jr.

Articles

The purpose of this article is to introduce some of the recent findings of evolutionary biology to the legal community and to urge their consideration in developing a more effective law. As background, Part II of this article will present a brief evolutionary history of our own species.

Part III offers a primer on Darwin's theory of natural selection and the concept of adaptation, with special attention to the elaboration of altruism as it is known in modern biology. Part IV discusses maladaptation as a counterpoise to adaptation and underscores the notion with some stories from natural history on subjects …