Albert v k lliker (35 risultati)

PAP. Condizione: New. New Book. Shipped from UK. Established seller since 2000.

PAP. Condizione: New. New Book. Shipped from UK. Established seller since 2000.

PAP. Condizione: New. New Book. Shipped from UK. Established seller since 2000.

PAP. Condizione: New. New Book. Shipped from UK. Established seller since 2000.

HRD. Condizione: New. New Book. Shipped from UK. Established seller since 2000.

HRD. Condizione: New. New Book. Shipped from UK. Established seller since 2000.

HRD. Condizione: New. New Book. Shipped from UK. Established seller since 2000.

HRD. Condizione: New. New Book. Shipped from UK. Established seller since 2000.

PAP. Condizione: New. New Book. Shipped from UK. Established seller since 2000.

PAP. Condizione: New. New Book. Shipped from UK. Established seller since 2000.

PAP. Condizione: New. New Book. Shipped from UK. Established seller since 2000.

PAP. Condizione: New. New Book. Shipped from UK. Established seller since 2000.

PAP. Condizione: New. New Book. Shipped from UK. Established seller since 2000.

PAP. Condizione: New. New Book. Shipped from UK. Established seller since 2000.

HRD. Condizione: New. New Book. Shipped from UK. Established seller since 2000.

HRD. Condizione: New. New Book. Shipped from UK. Established seller since 2000.

HRD. Condizione: New. New Book. Shipped from UK. Established seller since 2000.

HRD. Condizione: New. New Book. Shipped from UK. Established seller since 2000.

HRD. Condizione: New. New Book. Shipped from UK. Established seller since 2000.

HRD. Condizione: New. New Book. Shipped from UK. Established seller since 2000.

HRD. Condizione: New. New Book. Shipped from UK. Established seller since 2000.

HRD. Condizione: New. New Book. Shipped from UK. Established seller since 2000.

Paperback. Condizione: New. Print on Demand. This book delves into the captivating world of Halisarca, a unique sponge genus discovered in the 19th century. The author embarks on a detailed investigation of Halisarca lobularis and Halisarca Dujardini, meticulously studying their morphology and development. The author provides fascinating insights into the intricate organization of these sponges, revealing their distinctive layered structure and the complex network of canals and chambers that facilitate their vital functions. Through microscopic observations, the author deciphers the mechanics of water flow within the sponge, highlighting the crucial role of specialized cells in propelling water through the system. Beyond their structural complexity, the author explores the reproductive strategies of Halisarca, unveiling the formation and maturation of both male and female gametes. The development of sperm and eggs is described in meticulous detail, contributing to our understanding of the reproductive biology of sponges. This book not only adds to our knowledge of these intriguing creatures but also contributes to the broader study of sponge biology. The author's rigorous approach and comprehensive observations provide valuable insights into the structure and development of Halisarca, making this book an essential resource for researchers and enthusiasts of sponge biology. This book is a reproduction of an important historical work, digitally reconstructed using state-of-the-art technology to preserve the original format. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in the book. print-on-demand item.…

Paperback. Condizione: New. Print on Demand. This book introduces Tracheliastes polycolpus Nordm., a parasitic copepod belonging to a genus of rare species of crustaceans. The author's analysis of the parasite's anatomy and metamorphosis builds upon earlier work by the renowned naturalist A. von Nordmann. The author examines the morphological discrepancies between his specimens and the species originally described by Nordmann, proposing a new variety. Through detailed descriptions and illustrations, the author brings to light previously unobserved anatomical characteristics, including the detailed structure of the feeding apparatus, multiple pairs of lateral tactile organs, and internal organs. These findings contribute to our understanding of the natural history of copepods and provide a valuable resource for researchers in the field of invertebrate zoology. This book is a reproduction of an important historical work, digitally reconstructed using state-of-the-art technology to preserve the original format. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in the book. print-on-demand item.…

Paperback. Condizione: New. Print on Demand. This book comprehensively explores the vast diversity of flatworms, or Platyhelminthes, found across the globe, with a particular focus on those species that inhabit the coastal and inland waters of the United States of America and Canada. The author's detailed observations and meticulous analyses provide a rich understanding of the intricate world of these fascinating creatures. Throughout the book, the author delves into the different groups of flatworms, including acoels, rhabdocoels, and alloeocoels, examining their unique anatomical features, complex life cycles, and ecological roles. By integrating the latest scientific findings with historical accounts and the author's own extensive research, the book offers a comprehensive and authoritative reference for both professional biologists and curious naturalists alike. The author not only unravels the complexities of flatworm biology but also highlights their significance in marine and freshwater ecosystems. By shedding light on the diversity and ecology of these often-overlooked organisms, the book contributes to a deeper understanding of the intricate web of life that sustains our planet. This book is a reproduction of an important historical work, digitally reconstructed using state-of-the-art technology to preserve the original format. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in the book. print-on-demand item.…

Paperback. Condizione: New. Print on Demand. This book explores the theory that differences in the size and shape of wing hooks in bees relate to their designated role within the colony. The author meticulously examines this variation in hook morphology across different kinds of bees, exploring the implications for their reproductive biology. Additionally, the author explores ways to use this data to identify hybrid bees within a colony. This detailed study provides insights into bee developmental biology, particularly their reproductive system, and presents a new analytic tool for beekeepers to better understand and manage their colonies. This book is a reproduction of an important historical work, digitally reconstructed using state-of-the-art technology to preserve the original format. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in the book. print-on-demand item.…

Paperback. Condizione: New. Print on Demand. This book explores a type of tissue found in many mollusks. Found between organs and in linings of body cavities, this tissue supports and cushions the organs of the animal. In many mollusk species, this tissue is homogeneous, but the author discovered that in some species the tissue can be quite varied. The author discovered three types of cells that make up the heterogeneous tissue. The first type are stellate cells that connect to each other via thin extensions, forming a web. The second type are larger cells that have extensions containing fine parallel striations, a signature of hard, inflexible material. The third type of cell is a rounded cell with protrusions, often filled with granules. The author proposes that the second type of cell, because of its parallel striations, represents the start of the evolution of connective tissue, a type of tissue abundant in vertebrates. This book is a reproduction of an important historical work, digitally reconstructed using state-of-the-art technology to preserve the original format. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in the book. print-on-demand item.…

Paperback. Condizione: New. Print on Demand. This book provides a comprehensive scientific account of the structure and evolution of sponges using the model species Hircinia, a type of horny sponge traditionally used in bathing. The author, an accomplished scientist and expert in his field, meticulously describes the Hirciniaâs anatomy, with particular attention to its intricate internal canal systems and its unique cellular scaffolding made of a substance called spongin. After describing the structure and organization of the individual Hircinia sponge, the author goes on to discuss the broader evolutionary history of the species, using the lens of comparative anatomy and the fossil record to illuminate its deep evolutionary roots. This book will be of particular interest to professionals and advanced students of evolutionary biology and comparative anatomy, especially those with an interest in the diversity and history of life in the oceans. This book is a reproduction of an important historical work, digitally reconstructed using state-of-the-art technology to preserve the original format. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in the book. print-on-demand item. …

Paperback. Condizione: New. Print on Demand. This book investigates the first developmental processes of the fertilized egg in Muscidae flies, including the formation of Pole cells. The author challenges previously held beliefs within more than a century of research into how these flies develop. The book argues that the history of this specific area of research has been hindered by misinterpretations made by earlier authors. The author asserts that these misinterpretations have obscured the true path of development and goes on to describe in detail through various stages of observation and analysis, the corrected path of development for Muscidae flies, shedding new light on the subject and opening new avenues for scientific investigation. This book is a reproduction of an important historical work, digitally reconstructed using state-of-the-art technology to preserve the original format. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in the book. print-on-demand item.…

Paperback. Condizione: New. Print on Demand. This book continues the author's investigation into the nature of cells, their growth, division, communication, and death. The author proposes new insights into the fundamental question of what constitutes a cell by studying the structure of cells as a historical development, rather than as a static entity. This ontological approach grounds the study in evolution, and the book tracks the changes in cellular structure over time, and how these changes have determined the evolutionary fate of different groups of organisms. A profound understanding of cellular dynamics is critical to understanding both human biology and the origins of life on earth, and the author's work is groundbreaking in this field. This book is a reproduction of an important historical work, digitally reconstructed using state-of-the-art technology to preserve the original format. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in the book. print-on-demand item.…