Evolution And Speciation In Protozoa

DOWNLOAD

Download Evolution And Speciation In Protozoa PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get Evolution And Speciation In Protozoa book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page

Evolution And Speciation In Protozoa

DOWNLOAD
Author : T.J. Pandian
language : en
Publisher: CRC Press
Release Date : 2023-02-24

Evolution And Speciation In Protozoa written by T.J. Pandian and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-02-24 with Science categories.

The polyphyletic Protozoa have explored the possibility of performing almost all metazoan functions with a few subcellular organelles. Their unicellularity and structural simplicity have (i) limited diversity to 32,950 species, (ii) restricted spatial distribution to aquatic habitats (94%, against 15% in Metazoa), (iii) demonstrated the ubiquitous dominance of clonality, (iv) reduced sexualization in 50% species, (v) facilitated the use of vegetative gametes in 40% species and (vi) secondary loss of sex in 10% species. With the fastest multiplication rates, i.e. once every 6-60 hours, they occur in high densities of 105-106 cell/ml. Their diverse and complicated life cycles are described in 30 types. Being risky, the cycle involves two hosts in clonality > hermaphroditism > motility. Motility ranges from 2-3 μm for Rhizopoda to 400-2,000 μm for Ciliophora. Not surprisingly, 6,800 species of arcellinids, filosians and formainifers are testated or shelled. Within 1,229 sessile species, the peritrichid and suctorian ciliates are better adapted to coloniality. Unlike those of many Metazoa, the protozoan cyst is a dynamic stage, in which clonal or sexual reproduction occurs. Over 81% protozoans encyst, as it ensures (i) 90% survival during unfavorable conditions (against 15 in 12% non-encysted protozoans), (ii) genome transfer through generations, (iii) dispersal into new habitats and (iv) transmission to new hosts. Their mean body size ranges from 2 μm to 2 mm – a range over 1,000-times – only 8% aquatic metazoans cover a similar size range. In comparison to 77% macrophagy in Metazoa, only 46% protozoans are macrophagous predators. Within motile microphagy, protozoans filter 3-2 times smaller food particle at 50% cheaper clearance cost. This efficiency has expanded microphagy to 15% in protozoans, against 3% in Metazoa. Hence, their turnover rate in trophic dynamics is twice faster than that of metazoans. Foraminifers serve as ecological sensitive indicators in petroleum exploration and rise in sea level. For the first time, incidences of clonality and meiosis as well as symbiosis and parasitism have been shown to hint at the origin and evolution of different protozoan taxonomic groups during the geological past.

Ecology Of Protozoa

DOWNLOAD
Author : Genoveva F. Esteban
language : en
Publisher: Springer Nature
Release Date : 2021-01-04

Ecology Of Protozoa written by Genoveva F. Esteban and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-01-04 with Science categories.

This book emphasises the important role that protozoa play in many natural ecosystems. To shed new light on their individual adaptive skills, the respective chapters examine the ecology and functional biology of this diverse group of eukaryotic microbes. Protozoa are well-established model organisms that exemplify many general problems in population ecology and community ecology, as well as evolutionary biology. Their particular characteristics, like large population sizes, life cycles and motile sensory behaviour, have a profound impact on their survival, distribution, and interaction with other species. Thus, readers will also be introduced to protozoan habitats in a broad range of environments. Even though this group of unicellular organisms is highly diverse, the authors focus on shared ecological patterns. Students and scientists working in the areas of eukaryotic microbiology and ecology will appreciate this updated and revised 2nd Edition as a valuable reference guide to the “lifestyles” of protozoa.

Evolutionary Biology Genome Evolution Speciation Coevolution And Origin Of Life

DOWNLOAD
Author : Pierre Pontarotti
language : en
Publisher: Springer
Release Date : 2014-07-25

Evolutionary Biology Genome Evolution Speciation Coevolution And Origin Of Life written by Pierre Pontarotti and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-07-25 with Science categories.

This book includes the most essential contributions presented at the 17th Evolutionary Biology Meeting in Marseille, which took place in September 2013. It consists of 18 chapters organized according to the following categories: · Molecular and Genome Evolution · Phylogeography of Speciation and Coevolution · Exobiology and Origin of Life The aims of the annual meetings in Marseille, which bring together leading evolutionary biologists and other scientists using evolutionary biology concepts, e.g. for medical research, are to promote the exchange of ideas and to encourage interdisciplinary collaborations. Offering an overview of the latest findings in the field of evolutionary biology, this book represents an invaluable source of information for scientists, teachers and advanced students.

The Ciliated Protozoa

DOWNLOAD
Author : John O. Corliss
language : en
Publisher: Elsevier
Release Date : 2016-04-20

The Ciliated Protozoa written by John O. Corliss and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-04-20 with Science categories.

The Ciliated Protozoa: Characterization, Classification and Guide to the Literature, Second Edition presents a premature major overhauling of the systematics of the Ciliophora sensu lato, which is considered a separate phylum. This book includes a developed rationale and defined criteria that serve as a basis for the reclassification of the ciliates. Discussions of controversial taxa are provided, including arbitrary but critical resolution of their place in, or rejection from, the new overall system. The ideas concerning the evolution of ciliates, as well as "phylogenetic trees are also covered in this text. This text categorizes the ciliates into three classes—Kinetofragminophora, Oligohymenophora, and Polyhymenophora. This publication is a good source for biologists and students interested in ciliates.

Systematics And Evolution

DOWNLOAD
Author : David J. McLaughlin
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-03-09

Systematics And Evolution written by David J. McLaughlin and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-03-09 with Science categories.

This is an exciting time to produce an overview of the systematics and evolution of the fungi. Molecular and subcellular characters have given us our first view of the true phylogeny of the fungi. The systematic chapters present detailed illustrated treatments of specific fungal groups with the authors' interpretation of the systematics of that group as well as a survey of specific economic, ecological, morphological, ultrastructural, molecular and cultural data. Other chapters, in addition to treating techniques useful in modern mycology, provide the reader with views of the place of the fungi among the Eukaryotes and relationships within the Mycota. Volume VII, Part A, includes an overview of the fungal hierarchy, Pseudomycota, Chytridiomycota, Zygomycota, Ascomycota and their yeasts, and anamorphic states. Volume VII, Part B, includes the Basidiomycota and their yeasts, and chapters on speciation, molecular evolution, preservation, computer techniques, and nomenclature.

Strickberger S Evolution

DOWNLOAD
Author : Brian Hall
language : en
Publisher: Jones & Bartlett Learning
Release Date : 2008

Strickberger S Evolution written by Brian Hall and has been published by Jones & Bartlett Learning this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with Medical categories.

Thoroughly updated and reorganized, Strickberger's Evolution, Fourth Edition, presents biology students with a basic introduction to prevailing knowledge and ideas about evolution, discussing how, why, and where the world and its organisms changed throughout history. Keeping consistent with Strickberger's engaging writing style, the authors carefully unfold a broad range of philosophical and historical topics that frame the theories of today including cosmological and geological evolution and its impact on life, the origins of life on earth, the development of molecular pathways from genetic systems to organismic morphology and function, the evolutionary history of organisms from microbes to animals, and the numerous molecular and populational concepts thatexplain the earth's dynamic evolution.

Proceedings Of The Congress

DOWNLOAD
Author :
language : en
Publisher:
Release Date : 1961

Proceedings Of The Congress written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1961 with Protozoology categories.

Emerging Protozoan Pathogens

DOWNLOAD
Author : Naveed Ahmed Khan
language : en
Publisher: Taylor & Francis
Release Date : 2008-03-01

Emerging Protozoan Pathogens written by Naveed Ahmed Khan and has been published by Taylor & Francis this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008-03-01 with Science categories.

Emerging protozoan pathogens, once thought to be an obscure menace of society, have become a major threat to human health. The last two decades have seen major advances in the understanding of these increasingly important pathogens. Emerging Protozoan Pathogens provides a comprehensive account of up-to-date information on the present status of research in this discipline. Written by experts in their respective subject areas, this book provides a valuable resource for microbiologists and molecular and cell biologists at advanced undergraduate and graduate levels, as well as health professionals and researchers who are interested in these pathogens. The material covered, including biology, genomics, epidemiology, pathogenesis and treatments, makes it an ideal platform on which to base further research projects.

Biological Systematics

DOWNLOAD
Author : Alessandro Minelli
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06

Biological Systematics written by Alessandro Minelli and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.

To some potential readers of this book the description of Biological System atics as an art may seem outdated and frankly wrong. For most people art is subjective and unconstrained by universal laws. While one picture, play or poem may be internally consistent comparison between different art products is meaningless except by way of the individual artists. On the other hand modern Biological Systematics - particularly phenetics and cladistics - is offered as objective and ultimately governed by universal laws. This implies that classifications of different groups of organisms, being the products of systematics, should be comparable irrespective of authorship. Throughout this book Minelli justifies his title by developing the theme that biological classifications are, in fact, very unequal in their expressions of the pattern and processes of the natural world. Specialists are imbibed with their own groups and tend to establish a consensus of what constitutes a species or a genus, or whether it should be desirable to recognize sub species, cultivars etc. Ornithologists freely recognize subspecies and rarely do bird genera contain more than 10 species. On the other hand some coleopterists and botanists work with genera with over 1500 species. This asymmetry may reflect a biological reality; it may express a working practicality, or simply an historical artefact (older erected genera often contain more species). Rarely are these phenomena questioned.

Physical Approaches To Biological Evolution

DOWNLOAD
Author : Mikhail V. Volkenstein
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06

Physical Approaches To Biological Evolution written by Mikhail V. Volkenstein and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.

"Mr. Wolkenstein's Physical Approaches to Biological Evolution, whether or not it proves to give the ultimate truth on the matters with which it deals, certainly deserves, by its breadth and scope and profundity, to be considered an impor tant event in the philosophical world." This is a quotation from an introduction written by Bertrand Russell for Ludwig Wittgenstein's Tractatus Logico-Philosophicus. I exchanged only name and subject. As for the rest, I could continue quoting Russell, but I would rather say something myself. As Wittgenstein did with formal logic, Wolkenstein rectifies our views on how to approach the logic of life from a formal theoretical basis. Many bio logists do not believe that their subject lends itself to the scrutiny of physical theory. They certainly admit that one can simulate biological phenomena by models that can be expressed in a mathematical form. However, they do not believe that biology can be given a theoretical foundation that is defined within the general framework of physics. Rather, they insist on a holistic approach, banning any reduction to fundamental principles subject to physical theory.