965 resultados para Mutación (Biología)


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Incluye Bibliografía

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One of the science education objective, based on relationships between science, technology, society and environment (STSE) is, to form citizens capable on evaluating and taking decisions about the scientific advances impact on society and environment. In a two-way perspective, understand relationships between STSE, provides a vision of science as a human construction and therefore fallible, changeable and not neutral. In this study, we present some results from a comparative study on the influence of ethical conceptions of the nature of science, in two groups of future biology teachers, one from Brazil and, another one from Portugal. For data collection we constructed an attitude scale of Likert-type, which was validated mathematically and semantically. Results shows strong influence of social values, as in transgenic products, where the students’ ideas varied according to the ethical discussions more present in each country.

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This paper analyzes the history of the doctor and scientist Carlos Chagas in the research that led to the identification of the agent and vector responsible for Chagas disease (American trypanosomiasis), in the early twentieth century, pointing out some possibilities of using this piece of history in shaping Biology teachers, as regards the discussion of science as a process of human construction and therefore historical.

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The National Collection of Arachnids, Instituto de Biología, Universidad Nacional Autónoma de México (México City) houses 476 chilopod samples, of which 197 are determined to genus and/or species. These are documented here and represent several new state records. Topotypes of eight species of centipedes described by R. V. Chamberlin also documented. Resumen. La Colección Nacional de Arácnidos, del Instituto de Biología de la Universidad Nacional Autónoma de México (Ciudad de México), resguarda 476 muestras de quilópodos, de los que 197 están determinadas a nivel de género y/o especie. Algunas de estas muestras corresponden a nuevos registros estatales. Se documentan los topotipos de ocho especies de ciempiés descritos por R. V. Chamberlin.

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[ES]Este trabajo analiza diversos aspectos de la biología reproductora de la población nidificante de tortuga boba (Caretta caretta) en el archipiélago de Cabo Verde. Se estudiaron datos relacionados con la temporada de anidación, con la morfometría de las hembras, con el éxito de las salidas a tierra, con el tiempo de incubación y con el éxito de los nidos.