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Metamorphosis addresses various facets of postembryonic development, particularly signal transduction, morphogenesis, cell-cell interactions, and programmed cell death. A key feature of the book is its exploration of the molecular mechanisms underlying these processes. - Hormonal regulation of development - The mechanisms of hormone action - The steroid/thyroid hormone receptor family - Morphogenesis and programmed cell death
In this authoritative three-volume reference work, leading researchers bring together current work to provide a comprehensive analysis of the comparative morphology, development, evolution, and functional biology of the skull.
The origins of selected instances of metamorphosis in Germanic literature are traced from their roots in Ovid’s Metamorphoses, grouped roughly on an ‘ascending evolutionary scale’ (invertebrates, birds, animals, and mermaids). Whilst a broad range of mythological, legendary, fairytale and folktale traditions have played an appreciable part, Ovid’s Metamorphoses is still an important comparative analysis and reference point for nineteenth- and twentieth-century German-language narratives of transformations. Metamorphosis is most often used as an index of crisis: an existential crisis of the subject or a crisis in a society’s moral, social or cultural values. Specifically selected texts for analysis include Jeremias Gotthelf’s Die schwarze Spinne (1842) with the terrifying metamorphoses of Christine into a black spider, the metamorphosis of Gregor Samsa in Kafka’s Die Verwandlung (1915), ambiguous metamorphoses in E. T. A. Hoffmann’s Der goldne Topf (1814), Hermann Hesse’s Piktors Verwandlungen (1925), Der Steppenwolf (1927) and Christoph Ransmayr’s Die letzte Welt (1988). Other mythical metamorphoses are examined in texts by Bachmann, Fouqué, Fontane, Goethe, Nietzsche, Nelly Sachs, Thomas Mann and Wagner, and these and many others confirm that metamorphosis is used historically, scientifically, for religious purposes; to highlight identity, sexuality, a dream state, or for metaphoric, metonymic or allegorical reasons.
Hybrid Geographies reconsiders the relationship between human and non-human, the social and the material, showing how they are intimately and variously linked. General arguments, informed by work in critical geography, feminist theory, environmental ethics, and science studies are illustrated throughout with detailed case-study material.
The fascination of the Annelida to scientists lies in the beauty of their structures and the functionality of their body plan, the tremendous adaptive radiation which has made it possible for these animals to colonize almost all marine, limnic and terrestrial biotopes. In doing so they have evolved a great variety of life forms, and their reproduction and development are correspondingly diverse, with many modes and patterns unique in the animal kingdom. In this special volume recent progress in this broad research area is presented by 26 specialists, in general through surveys or treatments of selected examples. Some of them review important annelid taxa such as the Nereididae, Syllidae, Spionidae, Cirratulidae, Clitellata, and Pogonophora; others analyse reproductive and developmental structures and phenomena in annelids, e.g. segmental organs, sex pheromones, oogenesis, mating systems, sperm types, life cycles, larval settlement, cleavage and symmetry of embryos, or discuss controversial approaches to annelid systematics. The book will be of interest to all zoologists who work with annelids as well as to embryologists and other researchers in reproductive biology.