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Author: Aubrey Salazar Publisher: Scientific e-Resources ISBN: 1839474424 Category : Languages : en Pages : 304
Book Description
The origin and evolution of chordates is one of the most mysterious and interesting phenomena in evolutionary development science. Chordates are creatures characterized by possession of a notochord and pharyngeal gill openings. They comprise of three taxa: cephalochordates, urochordates (or tunicates), and vertebrates. Chordates belong to a supraphyletic gathering of deuterostomes, together with echinoderms and hemichordates, and are thought to have been derived from the regular ancestors of deuterostomes. Vertebrates evoloved by developing a body design with the greatest complexity among metazoans. Amid the 1980s, a new wave of molecular developmental science revealed that genes encoding interpretation factors and flag pathway molecules assume critical roles in the differentiation of embryonic cells, arrangement of organs and tissues, and morphogenesis for development of metazoan body designs. Presently, another wave of evolutionary developmental science studies revealed that metazoans from cnidarians to vertebrates, despite their diverse morphologies, utilize a very comparable set of interpretation factors and flag pathway molecules for body development: these genes are sometimes collectively called a genetic toolbox.
Author: Aubrey Salazar Publisher: Scientific e-Resources ISBN: 1839474424 Category : Languages : en Pages : 304
Book Description
The origin and evolution of chordates is one of the most mysterious and interesting phenomena in evolutionary development science. Chordates are creatures characterized by possession of a notochord and pharyngeal gill openings. They comprise of three taxa: cephalochordates, urochordates (or tunicates), and vertebrates. Chordates belong to a supraphyletic gathering of deuterostomes, together with echinoderms and hemichordates, and are thought to have been derived from the regular ancestors of deuterostomes. Vertebrates evoloved by developing a body design with the greatest complexity among metazoans. Amid the 1980s, a new wave of molecular developmental science revealed that genes encoding interpretation factors and flag pathway molecules assume critical roles in the differentiation of embryonic cells, arrangement of organs and tissues, and morphogenesis for development of metazoan body designs. Presently, another wave of evolutionary developmental science studies revealed that metazoans from cnidarians to vertebrates, despite their diverse morphologies, utilize a very comparable set of interpretation factors and flag pathway molecules for body development: these genes are sometimes collectively called a genetic toolbox.
Author: P.S.Verma Publisher: S. Chand Publishing ISBN: 8121916399 Category : Science Languages : en Pages : 686
Book Description
FOR B.Sc & B.Sc.(Hons) CLASSES OF ALL INDIAN UNIVERSITIES AND ALSO AS PER UGC MODEL CURRICULUMN Contents: CONTENTS:Protochordates:Hemicholrdata 1.Urochordata Cephalochordata Vertebrates : Cyclostomata 3. Agnatha, Pisces Amphibia 4. Reptilia 5. Aves Mammalia 7 Comparative Anatomy:lntegumentary System 8 Skeletal System Coelom and Digestive System 10 Respiratory System 11. Circulatory System Nervous System 13. Receptor Organs 14 Endocrine System 15 Urinogenital System 16 Embryology Some Comparative Charts of Protochordates 17 Some Comparative Charts of Vertebrate Animal Types 18 Index.
Author: P.S.Verma Publisher: S. Chand Publishing ISBN: 9788121916394 Category : Science Languages : en Pages : 1108
Book Description
FOR B.Sc & B.Sc.(Hons) CLASSES OF ALL INDIAN UNIVERSITIES AND ALSO AS PER UGC MODEL CURRICULUMN Contents: CONTENTS:Protochordates:Hemicholrdata 1.Urochordata Cephalochordata Vertebrates : Cyclostomata 3. Agnatha, Pisces Amphibia 4. Reptilia 5. Aves Mammalia 7 Comparative Anatomy:lntegumentary System 8 Skeletal System Coelom and Digestive System 10 Respiratory System 11. Circulatory System Nervous System 13. Receptor Organs 14 Endocrine System 15 Urinogenital System 16 Embryology Some Comparative Charts of Protochordates 17 Some Comparative Charts of Vertebrate Animal Types 18 Index.
Author: Dr. Shikha Jaggi Publisher: Thakur Publication Private Limited ISBN: 9357556192 Category : Education Languages : en Pages : 185
Book Description
Buy Latest (Zoology) Animal Diversity of Chordates (MAJOR/MINOR) e-Book in English Language for B.Sc 2nd Semester KUK/CRS University NEP-2020 By Thakur publication.
Author: Pranveer Singh Publisher: Nova Science Publishers ISBN: 9781634634571 Category : Chordata Languages : en Pages : 0
Book Description
The evolution to multicellular organisms determined the appearance of more sophisticated and specialized systems for the different physiologies like integumentary, respiration, digestion, excretion, circulatory, reproduction, skeletal and the nervous system. In the line of chordate evolution, advent of tetrapods have triggered the events leading to only partial dependence on water for physiological activities. The inconstant environment in which animals lives largely determine and guides the way animal physiology evolves. This directs the anatomical and morphological changes in the organism that translates into varied and diverse physiological process. This book describes the transition of life from aquatic to terrestrial habitat that brings about changes in feeding habit and subsequent anatomical and morphological changes in the digestive tract. Similar transition also guides modifications in urino-genital system due to demands of removing ammonia/urea or uric acid as excretory waste. The author of this book further explores the evolution of tetrapods as one major event in the evolutionary history of chordates in addition to adaptive radiation. This has transformed the locomotion from Fins' to Feet'. Demands of terrestrial life also means metabolism and energy requirements has to be met for which circulatory system was modified to incorporate more chambers and double circulation for warm bloodedness and increased metabolism to meet the energy requirements of life on land. Subsequently, as explored in the book, different organ systems underwent modification in organization to work together the best physiological adaptations to sustain life on earth.
Author: Noriyuki Satoh Publisher: Academic Press ISBN: 0128030062 Category : Science Languages : en Pages : 220
Book Description
Chordate Origins and Evolution: The Molecular Evolutionary Road to Vertebrates focuses on echinoderms (starfish, sea urchins, and others), hemichordates (acorn worms, etc.), cephalochordates (lancelets), urochordates or tunicates (ascidians, larvaceans and others), and vertebrates. In general, evolution of these groups is discussed independently, on a larger scale: ambulacrarians (echi+hemi) and chordates (cephlo+uro+vert). Until now, discussion of these topics has been somewhat fragmented, and this work provides a unified presentation of the essential information. In the more than 150 years since Charles Darwin proposed the concept of the origin of species by means of natural selection, which has profoundly affected all fields of biology and medicine, the evolution of animals (metazoans) has been studied, discussed, and debated extensively. Following many decades of classical comparative morphology and embryology, the 1980s marked a turning point in studies of animal evolution, when molecular biological approaches, including molecular phylogeny (MP), molecular evolutionary developmental biology (evo-devo), and comparative genomics (CG), began to be employed. There are at least five key events in metazoan evolution, which include the origins of 1) diploblastic animals, such as cnidarians; 2) triploblastic animals or bilaterians; 3) protostomes and deuterostomes; 4) chordates, among deuterostomes; and 5) vertebrates, among chordates. The last two have received special attention in relation to evolution of human beings. During the past two decades, great advances have been made in this field, especially in regard to molecular and developmental mechanisms involved in the evolution of chordates. For example, the interpretation of phylogenetic relationships among deuterostomes has drastically changed. In addition, we have now obtained a large quantity of MP, evo-devo, and CG information on the origin and evolution of chordates. Covers the most significant advances in this field to give readers an understanding of the interesting biological issues involved Provides a unified presentation of essential information regarding each phylum and an integrative understanding of molecular mechanisms involved in the origin and evolution of chordates Discusses the evolutionary scenario of chordates based on two major characteristic features of animals—namely modes of feeding (energy sources) and reproduction—as the two main forces driving animal evolution and benefiting dialogue for future studies of animal evolution
Author: Aubrey Salazar
Author: Aubrey Salazar
Author: Dr. Gurcharan Singh
Author: G. S. Sandhu
Author: P.S.Verma
Author: P.S.Verma
Author: E. L. Jordan
Author: Dr. Shikha Jaggi
Author: Prof. Prem Ranjan
Author: Pranveer Singh
Author: Noriyuki Satoh