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On The Embryology Of Echinoderms
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Book Synopsis Embryology of Echinoderms by : Alexander Agassiz
Download or read book Embryology of Echinoderms written by Alexander Agassiz and published by Legare Street Press. This book was released on 2023-07-18 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive study of the embryonic development of echinoderms, including sea stars, sea urchins, and sea cucumbers. In this seminal work, Alexander Agassiz provides detailed descriptions of the various stages of development and the mechanisms involved in the formation of the adult organism. This book is essential reading for anyone interested in the fascinating world of marine biology. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Book Synopsis Studies of the Development and Larval Forms of Echinoderms by : Theodor Mortensen
Download or read book Studies of the Development and Larval Forms of Echinoderms written by Theodor Mortensen and published by . This book was released on 1921 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis On the Embryology of Echinoderms by : Alexander Agassiz
Download or read book On the Embryology of Echinoderms written by Alexander Agassiz and published by . This book was released on 1864 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Reproduction and Development in Echinodermata and Prochordata by : T. J. Pandian
Download or read book Reproduction and Development in Echinodermata and Prochordata written by T. J. Pandian and published by CRC Press. This book was released on 2018-04-17 with total page 477 pages. Available in PDF, EPUB and Kindle. Book excerpt: Echinoderms and prochordates occupy a key position in vertebrate evolution. The genomes of sea urchin share 70% homology with humans. Researches on cell cycle in sea urchin and phagocytosis in asteroids have fetched Nobel Prizes. In this context, this book assumes immense importance. Echinoderms are unique, as their symmetry is bilateral in larvae but pentamerous radial in adults. The latter has eliminated the development of an anterior head and bilateral appendages. Further, the obligate need to face the substratum for locomotion and acquisition of food has eliminated their planktonic and nektonic existence. Egg size, a decisive factor in recruitment, increases with decreasing depths up to 2,000-5,000 m in lecithotrophic asteroids and ophiuroids but remains constant in their planktotrophics. Smaller ( 110 mm) asteroids generate planktotrophic eggs only. Publications on sex ratio of echinoderms indicate the genetic determination of sex at fertilization but those on hybridization, karyotype and ploidy induction do not provide evidence for heterogametism. But the herbivorous echinoids and larvacea with their gonads harboring both germ cells and Nutritive Phagocytes (NPs) have economized the transportation and hormonal costs on gonadal function. Despite the amazing potential just 2 and 3% of echinoderms undergo clonal reproduction and regeneration, respectively. Fission is triggered, when adequate reserve nutrients are accumulated. It is the most prevalent mode of clonal reproduction in holothuroids, asteroids and ophiuroids. However, budding is a more prevalent mode of clonal reproduction in colonial hemichordates and urochordates. In echinoderms, fission and budding eliminate each other. Similarly, autoregulation of early development eliminates clonal reproduction in echinoids and solitary urochordates. In pterobranchs, thaliaceans and ascidians, the repeated and rapid budding leads to colonial formation. Coloniality imposes reductions in species number and body size, generation time and life span, gonad number and fecundity as well as switching from gonochorism to simultaneous hermaphorditism and oviparity to ovoviviparity/viviparity.
Book Synopsis On the Embryology of Echinoderms, Vol. 9 (Classic Reprint) by : Alexander Agassiz
Download or read book On the Embryology of Echinoderms, Vol. 9 (Classic Reprint) written by Alexander Agassiz and published by Forgotten Books. This book was released on 2018-02-06 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from On the Embryology of Echinoderms, Vol. 9 The yolk contracts somewhat immediately after the fecundation takes place, and we might repeat here, word for word, the description of the changes which the yolk und goes in the Starfishes, and have the history of the changes during the segmentation of the yolk of an Echinus. For an account of this I would refer the reader to the fifth volume of the Contributions to the Natural History of the United States, by Professor Agassiz. The embryo, on escaping from the egg, resembles a Starfish embryo, and it would greatly puzzle any one to perceive any difference between them. The forma tion of the stomach, of the asophagus, the intestine, and the water-tubes takes place in exactly the same manner as in the Starfish, the time only at which these different organs are differentiated not being the same. We have thus very early in the history of these two orders differences which to a practised eye tell at once to which of them the young larva belongs. What is a particularly important difference is the forma tion in Ophiurans and in Echinoids of calcareous rods at an early period of the larval condition. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Download or read book Echinoderms written by and published by Academic Press. This book was released on 2019-02-16 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt: Echinoderms, Volume 150 in the Methods in Cell Biology series, highlights new advances in the field, with this update presenting interesting chapters on procuring animals and culturing of eggs and embryos, cryopreservation of sea urchin gametes, emerging echinoderm models, culturing of sand dollars, cidaroids and heart urchins, culturing echinoderm larvae through metamorphosis, microinjection methods, injection of exogenous messages and protein overexpression, blastomere transplantation, visualization of embryonic polarity, larval immune cell approaches, methods for analysis of sea urchin primordial germ cells, and protocols and best practices for toxicology and pH studies using echinoderms and several new chapters outlining the use of sea urchins in the classroom. Clear, concise protocols provided by experts who have established the echinoderms as a model system Highlights new advances in the field, with this update presenting interesting chapters on echinoderms
Book Synopsis Experimental Embryology of Echinoderms by : Sven Hörstadius
Download or read book Experimental Embryology of Echinoderms written by Sven Hörstadius and published by Oxford University Press, USA. This book was released on 1973 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Gene Regulatory Mechanisms in Development and Evolution: Insights from Echinoderms by :
Download or read book Gene Regulatory Mechanisms in Development and Evolution: Insights from Echinoderms written by and published by Academic Press. This book was released on 2022-02-10 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sea urchins and other echinoderms, which have been studied intensively by developmental biologists for more than a century, are currently among the most prominent models for elucidating the genomic regulatory processes that control embryogenesis and the evolution of those processes. This volume contains reviews from the world’s leading researchers who are using echinoderms to address these questions. Chapters focus on gene regulatory networks that drive the differentiation and morphogenesis of major embryonic tissues such as the skeleton, muscle, nervous system, immune system, pigment cells, and germ line, and on evolutionary insights from comparative studies of these networks across echinoderms and other taxa. Other chapters comprehensively review the architecture and evolution of the cell signaling pathways that establish the early embryonic axes and on recent evolutionary changes in gene networks that have led to dramatic changes in the life history modes of echinoderms. This volume provides a comprehensive, current picture of exciting research at the interface between developmental genomics and evolution from one of the research communities leading this work. Contributions from leading investigators who use echinoderms as model organisms Up-to-date reviews of developmental gene regulatory networks Current work at the interface between developmental genomics and evolution
Book Synopsis Development of Sea Urchins, Ascidians, and Other Invertebrate Deuterostomes: Experimental Approaches by : Charles A. Ettensohn
Download or read book Development of Sea Urchins, Ascidians, and Other Invertebrate Deuterostomes: Experimental Approaches written by Charles A. Ettensohn and published by Gulf Professional Publishing. This book was released on 2004-10-22 with total page 948 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a practical guide to experimental methods for studying the development of invertebrate deuterostomes, such as sea urchins, ascidians, hemichordates, and amphioxus. These model organisms are of contemporary and historical importance to the study of developmental biology, particularly genomic research. The chapters provide detailed experimental protocols that cover a broad range of topics in modern experimental methods. Topics covered range from rearing embryos to the care of adult animals, while also presenting the basic experimental methods including light and electron microscopy, used to study gene expression, transgenics, reverse genetics, and genomic approaches. * Covers a wide range of methods, from classical embryology through modern genomics * Discusses animals related to vertebrates, providing a valuable evolutionary perspective * Includes a practical guide to the use of sea urchins in the teaching laboratory
Book Synopsis Concepts of Biology by : Samantha Fowler
Download or read book Concepts of Biology written by Samantha Fowler and published by . This book was released on 2018-01-07 with total page 618 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concepts of Biology is designed for the single-semester introduction to biology course for non-science majors, which for many students is their only college-level science course. As such, this course represents an important opportunity for students to develop the necessary knowledge, tools, and skills to make informed decisions as they continue with their lives. Rather than being mired down with facts and vocabulary, the typical non-science major student needs information presented in a way that is easy to read and understand. Even more importantly, the content should be meaningful. Students do much better when they understand why biology is relevant to their everyday lives. For these reasons, Concepts of Biology is grounded on an evolutionary basis and includes exciting features that highlight careers in the biological sciences and everyday applications of the concepts at hand.We also strive to show the interconnectedness of topics within this extremely broad discipline. In order to meet the needs of today's instructors and students, we maintain the overall organization and coverage found in most syllabi for this course. A strength of Concepts of Biology is that instructors can customize the book, adapting it to the approach that works best in their classroom. Concepts of Biology also includes an innovative art program that incorporates critical thinking and clicker questions to help students understand--and apply--key concepts.
Book Synopsis Echinoderm Larvae by : Herbert Clifton Chadwick
Download or read book Echinoderm Larvae written by Herbert Clifton Chadwick and published by . This book was released on 1914 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Selections from Embryological Monographs by : Alexander Agassiz
Download or read book Selections from Embryological Monographs written by Alexander Agassiz and published by . This book was released on 1883 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Sea Urchin Embryo by : G. Czihak
Download or read book The Sea Urchin Embryo written by G. Czihak and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 719 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sea urchin eggs are objects of wonder for the student who sees them for the first time under the microscope. The formation of the fertil ization membrane after insemination, the beauty of mitotic cleavage, the elegant swimming of embryos, remain an esthetic pleasure even for the eyes of seasoned investigators. But sea urchin eggs have other, more practical, advantages: they lend themselves to surgical operation without difficulty and they heal perfectly; they can be obtained in very large amounts and represent thus an extremely favorable material for biochemists and molecular embryologists. It is not surprising that, in view of these exceptional advantages, sea urchin eggs have attracted the interest of innumerable biologists since O. HERTWIG discovered the fusion of the pronuclei (amphimixy), in Paracentrotus lividus, almost a century ago. The purpose of the present book is to present, in a complete and orderly fashion, the enormous amount of information which has been gathered, in the course of a hun dred years of sea urchin embryology. JOSEPH NEEDHAM, in 1930, was still able to present all that was known, at that time, on the biochemistry of all possible species of developing eggs and embryos in his famous "Chemical Embryology" (Cambridge University Press) . It would no longer be possible for one man to write a modern version of what was a "Bible" for the young embryologists of forty years ago.
Book Synopsis Molecular Paleobiology of the Echinoderm Skeleton by : Jeffrey R. Thompson
Download or read book Molecular Paleobiology of the Echinoderm Skeleton written by Jeffrey R. Thompson and published by Cambridge University Press. This book was released on 2022-12-01 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: The echinoderms are an ideal group to understand evolution from a holistic, interdisciplinary framework. The genetic regulatory networks underpinning development in echinoderms are some of the best known for any model group. Additionally, the echinoderms have an excellent fossil record, elucidating in in detail the evolutionary changes underpinning morphological evolution. In this Element, the echinoderms are discussed as a model group for molecular palaeobiological studies, integrating what is known of their development, genomes, and fossil record. Together, these insights shed light on the molecular and morphological evolution underpinning the vast biodiversity of echinoderms, and the animal kingdom more generally.
Book Synopsis Studies of the Development and Larval Forms of Echinoderms by : Theodor Mortensen
Download or read book Studies of the Development and Larval Forms of Echinoderms written by Theodor Mortensen and published by . This book was released on 1921 with total page 261 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Echinoderms Part B written by and published by Academic Press. This book was released on 2019-04-02 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt: Echinoderms, Volume 151, the latest release in the Methods in Cell Biology series, highlights advances in the field, with this update presenting chapters on Echinoderm Genome Databases, analysis of gene regulatory networks, using ATAC-seq and RNA-seq to increase resolution in GRN connectivity, multiplex cis-regulatory analysis, experimental approaches GRN/signal pathways, BACs, analysis of chromatin accessibility using ATAC-seq, analysis of sea urchin proteins /Click IT, CRISPR/Cas9-mediated genome editing in sea urchins, super-resolution and in toto imaging of echinoderm embryos, and methods for analysis of intracellular ion signals in sperm, eggs and embryos. Presents clear, concise protocols provided by experts who have established the echinoderms as a model systems Highlights new advances in the field, with this update presenting interesting chapters on echinoderms
Book Synopsis Biology of Echinodermata by : D.R. Khanna
Download or read book Biology of Echinodermata written by D.R. Khanna and published by Discovery Publishing House. This book was released on 2005 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present title Biology of Echinodermata has been carefully compilated on the basis of all recent researches and investigation made on Echinoderms. It is intended for undergraduate and postgraduate students of all universities. The text material has been written in a very easy, clear, lucid and straight forward manner to make a clear and vivid understanding. All important types have been dealt with complete, authentic and up-to-date account including morphology anatomy, physiology and development of selected types. Efforts have been made to condense the matter as far as practicable. It is hoped that the Biology of Echinodermata will not only meet the requirement of Indian students but will also be useful as a guideline to the teachers and researchers. Contents: Introduction, Asterias, Echinoidea, Holothuroidea, Ophiuroidea, Crinoidea, Influence of Environment, Development of Larva, Water-vascular System in Echinodermata.
