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Vertebrates possess lineage-specific characteristics. These include paired anterior sense organs and a robust, modular head skeleton built of cellular cartilage and bone. All of these structures are derived, at least partly, from an embryonic tissue unique vertebrates - the neural crest. The evolutionary history of the neural crest, and neural crest cells, has been difficult to reconstruct. This volume will use a comparative approach to survey the development of the neural crest in vertebrates, and neural crest-like cells, across the metazoa. This information will be used to reveal neural crest evolution and identify the genomic, genetic, and gene-regulatory changes that drove them. Key selling features: Summarizes the data regarding neural crest cells and nerural crest derivatives Uses a broad-based comparative approach Suggests hypothesis that the origin of neural crest cells involved the novel co-activation of ancient metazoan gene programs in neural border cells Illustrates how the emergences of neural crest made possible the diversification of vertebrate heads
Although it is the defining organ of the Chordata, the notochord and its cells are one of the least understood vertebrate organs. This may be because large parts of the notochord are often replaced with cartilaginous or bony vertebral bodies. The presence of cartilage in the notochord raises questions about the evolutionary relationships between notochord cells and cartilage cells. This book integrates classical analytical studies with recent palaeontological, experimental, and molecular studies in both developmental and evolutionary contexts. For example, although the early signaling function of the notochord is conserved across the vertebrates, many will be surprised to find that the role ...
Phenotypic plasticity – the ability of an individual organism to alter its features in direct response to a change in its environment – is ubiquitous. Understanding how and why this phenomenon exists is crucial because it unites all levels of biological inquiry. This book brings together researchers who approach plasticity from diverse perspectives to explore new ideas and recent findings about the causes and consequences of plasticity. Contributors also discuss such controversial topics as how plasticity shapes ecological and evolutionary processes; whether specific plastic responses can be passed to offspring; and whether plasticity has left an important imprint on the history of life....
The evolution of segmentation is one of the central questions in evolutionary developmental biology. Indeed, it is one of the best case studies for the role of changes in development in the evolution of body plans. Segmented body plans are believed to have appeared several times in animal evolution, and to have contributed significantly to the evolutionary success of the taxa in which they are present. Because of the centrality of the subject, and the continuing interest in understanding segmentation, this book offers an often overlooked focus on the cellular aspects of the process of segmentation, providing an invaluable reference for students of evolutionary developmental biology at all le...
Many complex traits define the primate condition, including behaviors as fundamental as locomotion and traits as scrutinized as the dentition, and their study reveals dramatic evolutionary change across the primates. Genetic modifications are at the basis of these changes, but transformation of genetic information into phenotypes occurs at the level of the cell, which is the focus of this book. Contributors summarize novel methodologies to analyze the collective behavior of cells in forming tissues and organs influencing physiological functions and anatomical features that enable behaviors. Our goal is to review current knowledge and encourage others to adopt evolutionary cell biology to aid...
The evolution of animal diversity is strongly affected by the origin of novel cell and tissue types and their interactions with each other. Understanding the evolution of cell types will shed light on the evolution of novel structures, and in turn highlight how animals diversified. Several cell types may also have been lost as animals simplified – for example did sponges have nerves and lose them? This book reveals the interplay between gains and losses and provides readers with a better grasp of the evolutionary history of cell types. In addition, the book illustrates how new cell types allow a better understanding permitting the discrimination between convergence and homology.
This volume examines cells set aside during development for use later in ontogeny or in adult life. There is no single term for such cells. The cells explored fall within several major categories — stem cells, set-aside cells (in echinoderm larvae), imaginal discs in insects such as Drosophila, meristems (plants), blastemata (regeneration in amphibians), neoblasts (regeneration in planarians). The book compares and contrasts these cell types and the environments (niches) in which they operate with the aim of unravelling any relationships between them, between their activation in development, and in their evolution. Key Features Explores the nature of deferred-use cells in evolutionary and ...
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