Though the fossil record is incomplete, numerous studies have demonstrated that there is enough information available to give a good understanding of the pattern of diversification of life on Earth. [2 ] [3 ] [4 ] In addition, the record…
Abstract. Following the acceptance of plate tectonics theory in the latter half of the 20th century, vicariance became the dominant explanation for the dis
Queridos Hermanos y hermanas hoy nos reunimos para celebrar la fiesta de la Epifanía, una ocasión trascendental en el calendario litúrgico cristiano. La Epifanía, que significa "manifestación" o "revelación", conmemora la visita de los…
Hoy celebramos la fiesta de la conversión de San Pablo “Saulo, Saulo, ¿por qué me persigues?” Le respondí: "¿Quién es usted, señor?" Y él me dijo: “Yo soy Jesús el Nazareno a quien vosotros perseguís”. Hechos 22:7-8 Celebramos hoy una de…
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Tyrosine aminotransferase (Aatat) from the hornwort Anthoceros agrestis Paton (Anthocerotaceae) was amplified and expressed in E. coli. The active enzyme i
Guide for the Development of Bicycle Facilities, 3rd Edition, American Association of State Highway and Transportation Officials (Washington DC; 888-227-4860; www.aashto.org); available online at www.bikefed.org.
One of the most remarkable examples of convergent evolution among vertebrates is illustrated by the independent origins of an active electric sense in South American and African weakly electric fishes, the Gymnotiformes and Mormyroidea…