Evolutionary Cell Biology

This book is the first in a projected series on Evolutionary Cell Biology, the intent of which is to demonstrate the essential role of cellular mechanisms in transforming the genotype into the phenotype by transforming gene activity into evolutionary change in morphology. This book —Cells in Evolutionary Biology — evaluates the evolution of cells themselves and the role cells have been viewed to play as agents of change at other levels of biological organization. Chapters explore Darwin’s use of cells in his theory of evolution and how Weismann’s theory of the separation of germ plasm from body cells brought cells to center stage in understanding how acquired changes to cells within generations are not passed on to future generations. The study of evolution through the analysis of cell lineages during embryonic development dominated evolutionary cell biology until usurped by the switch to genes as the agents of heredity in the first decades of the 20th century. Discovery that cells exchanged organelles via symbiosis led to a fundamental reevaluation of prokaryotic and eukaryotic cells and to a reorganizations of the Tree of Life. Identification of cellular signaling centers, of mechanisms responsible for cellular patterning, and of cell behavior and cellular condensations as mediating the plasticity that enables phenotypic change during evolution, provided powerful new synergies between cell biology and evolutionary theory and the basis for Evolutionary Cell Biology.

Among the most important innovations in the history of life is the transition from single-celled organisms to more complex, multicellular organisms. Multicellularity has evolved repeatedly across the tree of life, resulting in the evolution of new kinds of organisms that collectively constitute a significant portion of Earth’s biodiversity and have transformed the biosphere. This volume examines the origins and subsequent evolution of multicellularity, reviewing the types of multicellular groups that exist, their evolutionary relationships, the processes that led to their evolution, and the conceptual frameworks in which their evolution is understood. This important volume is intended to serve as a jumping-off point, stimulating further research by summarizing the topics that students and researchers of the evolution of multicellularity should be familiar with, and highlighting future research directions for the field.

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 in deciphering the genotype-phenotype map that underlies the diversification of primates, human variation, and human evolution. The contributors to this book utilize advances in genetic analysis and visualization of cells and tissues and merge evolutionary developmental biology with evolutionary cell biology to address questions central to understanding human and primate evolution. Key Features Explores mechanisms underlying trait development, distribution, variation, and evolution, especially with respect to pigmentation, dental formulae, the skeleton, energetics, and temperature-related morphological variation Documents the advantages for anthropologists to work at the level of cells, focusing on how genes provide instructions for cells to make structure and how environment affects the behavior of cells Illustrates the role cell biology plays in pelage growth and pigmentation, facial morphology, melanin production in pigmentation, dental development and tooth loss, and energy expenditure Describes novel methodologies and techniques to analyze environment- and temperature-related influences on phenotypes Demonstrates how significant changes in life history occur at the level of the cell Related Titles Bianchi, L. Developmental Neurobiology (ISBN 978-0-8153-4482-7) King, G. R. Primate Behavior and Human Origins (ISBN 978-1-138-85317-1) Rhys Evans, P. H. The Waterside Ape: An Alternate Account of Human Evolution (ISBN 978-0-367-14548-4)

The fields of molecular evolution, genome evolution, and evolutionary genetics are now well-established. Remarkably, however, although all evolutionary modifications begin at the cellular level, and despite the advances made in cell biology and microbiology over the past few decades, there is as yet no recognised discipline of evolutionary cell biology. The goal of this book is to help establish the foundations for this emerging field. Its principal aims are twofold: firstly, to promote an understanding among evolutionary biologists as to why the cellular details matter if we are to understand the mechanisms of evolution; secondly, to make clear to non-evolutionary biologists - cell biologists in particular - that evolution is not just a matter of natural selection and optimization, but a process whose reach depends on other population genetic features such as mutation, recombination, and random genetic drift. Although there are many excellent books on cell biology, microbiology, and biophysics, almost no attention is given to evolution. Likewise, although there are numerous evolutionary biology books on the market, none of them gives more than passing attention to details at the cellular level. Thus Evolutionary Cell Biology is genuinely novel, offering a broader understanding of evolutionary processes and an appreciation for the many interesting problems that remain to be solved at the cellular and subcellular levels. This advanced textbook is aimed at both cell biologists and evolutionary biologists. It will be accessible to upper-level undergraduates in biology, and certainly to graduate students in all areas of the life sciences. Professionals from a wide range of fields - cell biology, microbiology, evolution, biophysics, biochemistry, and mathematics - will be exposed to entirely new ideas not traditionally covered in their primary fields of expertise.

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.

Many complex traits define the human condition, including encephalization and bipedalism. The specific molecular signals and cellular processes producing these traits are the result of dramatic evolutionary change. At the same time, conservation of many of these developmental programs underlie both structure and function. Novel methodologies and techniques allow analysis of the collective behavior of cells, cell shapes, tissues, and organs. This volume demonstrates the essential role of cellular mechanisms in the evolutionary increase in the size and complexity of the primate brain. In addition, and concordant with encephalization, this book documents changes in the muscles and bones associated with the appearance of bipedalism. Genetic changes are the basis of these evolutionary changes, but transformation of genetic information into phenotypic outcomes occurs at the level of the cell, and this is the focus of the book. The goal is to encourage others to adopt evolutionary cell biology as a novel and necessary approach to the genotype-phenotype map of the diversification of primates, human variation, and human evolution. The contributors to this book utilize advances in genetic analysis, visualization of cells and tissues, and the merging of evolutionary developmental biology with evolutionary cell biology to address questions central to understanding the human and primate evolution. Key Features Explores mechanisms underlying trait distribution, dispersal, variation, and evolution through the direct testing of hypotheses especially with respect to patterns of encephalization, certain sensory modalities, and growth and life history specializations. Documents the advantages for anthropologists to work at the level of cells focusing on how genes provide instructions for cells to make structure and how environmental influences affect the behavior of cells. Illustrates the role cell biology plays with respect to encephalization, neocortical expansion, variation in facial morphology, locomotion, and dexterity. Describes novel methodologies and techniques allowing analysis of how the collective behavior of cells shapes tissues and organs. Related Titles Ripamonti, U., ed. Induction of Bone Formation in Primates: The Transforming Growth Factor-beta 3 (ISBN 978-0-3673-7740-3). Gordon, M. S., et al., eds. Animal Locomotion: Physical Principles and Adaptations (ISBN 978-0-3676-5795-6) Bianchi, L. Developmental Neurobiology (ISBN 978-0-8153-4482-7)

A more comprehensive version of evolutionary theory that focuses as much on the origin of biological form as on its diversification. The field of evolutionary biology arose from the desire to understand the origin and diversity of biological forms. In recent years, however, evolutionary genetics, with its focus on the modification and inheritance of presumed genetic programs, has all but overwhelmed other aspects of evolutionary biology. This has led to the neglect of the study of the generative origins of biological form. Drawing on work from developmental biology, paleontology, developmental and population genetics, cancer research, physics, and theoretical biology, this book explores the multiple factors responsible for the origination of biological form. It examines the essential problems of morphological evolution—why, for example, the basic body plans of nearly all metazoans arose within a relatively short time span, why similar morphological design motifs appear in phylogenetically independent lineages, and how new structural elements are added to the body plan of a given phylogenetic lineage. It also examines discordances between genetic and phenotypic change, the physical determinants of morphogenesis, and the role of epigenetic processes in evolution. The book discusses these and other topics within the framework of evolutionary developmental biology, a new research agenda that concerns the interaction of development and evolution in the generation of biological form. By placing epigenetic processes, rather than gene sequence and gene expression changes, at the center of morphological origination, this book points the way to a more comprehensive theory of evolution.