When Was Chordata Discovered | Keyword Rankings

Google Keyword Rankings for : when was chordata discovered

1 Chordate - Wikipedia
https://en.wikipedia.org/wiki/Chordate
Chordate fossils have been found from as early as the Cambrian explosion, 539 million years ago. Cladistically (phylogenetically), vertebrates – chordates ...
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2 Chordate Evolution - Advanced ( Read ) | Biology - CK-12
https://www.ck12.org/c/biology/chordate-evolution/lesson/Chordate-Evolution-Advanced-BIO-ADV/
The oldest known chordate fossil was found in China and described in 1995. It is a member of the species Yunnanozoon lividium, ...
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3 Chordata Haeckel, 1874 - GBIF
https://www.gbif.org/species/113225632
Chordate fossils have been found from as early as the Cambrian explosion, 539 million years ago. Cladistically (phylogenetically), vertebrates – chordates ...
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4 Chordate evolution and the three-phylum system - Journals
https://royalsocietypublishing.org/doi/10.1098/rspb.2014.1729
Multicellular animals are often divided into vertebrates and invertebrates. Historically, this classification dates back to ca 500 BC. During ...
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5 Chordata - an overview | ScienceDirect Topics
https://www.sciencedirect.com/topics/biochemistry-genetics-and-molecular-biology/chordata
Chordate fossils and even agnathan fishes are part of the Chengjiang Cambrian fauna in South China found in deposits of 545–490 Ma, but chordate fossils evolved ...
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6 Evolution of the chordate body plan: New insights from ... - PNAS
https://www.pnas.org/doi/10.1073/pnas.97.9.4469
The deuterostome phyla include Echinodermata, Hemichordata, and Chordata. ... We found Vertebrata to be monophyletic and a sister clade to Cephalochordata, ...
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7 Evolution and Development of the Chordates - Oxford Academic
https://academic.oup.com/mbe/article/23/3/541/1110188
Recent evidence suggests that hemichordates lack a notochord and a dorsal central nervous system (CNS), which are found in chordates (Lowe et al.
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8 Facts and fancies about early fossil chordates and vertebrates
https://www.nature.com/articles/nature14437
Most of these fossils have been referred to as chordates because they ... The fossil lampreys came as a surprise when first discovered in ...
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9 Origin and Evolution of Chordates - Magadh University
https://www.magadhuniversity.ac.in/download/econtent/pdf/Origin%20and%20Evolution%20of%20Chordates.pdf
found in some marine forms such as myxinoids and sharks. This hints to the. Marine origin of chordates. Chordates evolved from some deuterostome ancestor ...
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10 Chordates • Earthpedia • Earth.com
https://www.earth.com/earthpedia-articles/chordates/
In fact, some of the first chordate fossils discovered were initially thought to be worms! The first was discovered in the early 20th century, ...
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11 Seeing chordate evolution through the Cionagenome sequence
https://genomebiology.biomedcentral.com/articles/10.1186/gb-2003-4-3-208
Chordate features such as the notochord and the muscular tail are visible, ... The team [2] identified 15,852 gene models in Ciona, ...
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12 Chordata - Definition and Examples - Biology Online Dictionary
https://www.biologyonline.com/dictionary/chordata
In evolutionary history, the fossil records of the chordates can easily be found around 530 million years ago in the early period of Cambrian ...
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13 Origin and Evolution of Chordates - BioOne
https://bioone.org/journals/zoological-science/volume-18/issue-4/zsj.18.447/Origin-and-Evolution-of-Chordates/10.2108/zsj.18.447.full
The insights gained from molecular biology and micro-anatomy were augmented about a year ago by the discovery of chordate fossils from the ...
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14 Phylum Chordata - University of Hawaii at Manoa
https://manoa.hawaii.edu/exploringourfluidearth/biological/invertebrates/phylum-chordata
Most species within the phylum Chordata are vertebrates, or animals with ... docks will likely lead to discovering tunicates attached to rocks or pilings.
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15 Chordata: Overview and Basal Taxa
https://www.digitalatlasofancientlife.org/learn/chordata/
The phylum Chordata includes many familiar animals. ... Discovery of fossil lamprey larva from the Lower Cretaceous reveals it three-phased ...
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16 Origin of the Chordate Notochord - MDPI
https://www.mdpi.com/1424-2818/13/10/462
The phylum of Chordata is defined based on the discovery of a coelom-like dorsal notochord in ascidian and amphioxus embryos. Chordata can be classified ...
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17 Ascidiacea World Database
https://www.marinespecies.org/ascidiacea/
Kowalevsky discovered the chordate nature of the ascidian tadpole larva in 1866; the Ascidiacea were then reclassified as chordates rather than as molluscs ...
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18 Chordate phylogeny and evolution: a not so simple three ...
https://zslpublications.onlinelibrary.wiley.com/doi/10.1111/j.1469-7998.2008.00497.x
There are two corresponding genes in craniates to the orthologous Pax1/9 gene that is found in tunicates and cephalochordates. These genes are ...
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19 Chordates | Biology for Majors II - Lumen Learning
https://courses.lumenlearning.com/suny-wmopen-biology2/chapter/chordates/
Extant members of Cephalochordata are the lancelets, named for their blade-like shape. Lancelets are only a few centimeters long and are usually found buried in ...
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20 INTRODUCTION TO VERTEBRATE NATURAL HISTORY
https://www.shsu.edu/~bio_mlt/Part1.html
or a location where the species was discovered: ... These characteristics may be found in some of the ancestors of chordates and are commonly placed in an ...
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21 Chordate evolution and the three-phylum system - DOE Joint ...
https://jgi.doe.gov/publication/chordate-evolution-and-the-three-phylum-system-3/
Giant Bacteria Found in Guadeloupe Mangroves Challenge Traditional Concepts Harnessing JGI and Berkeley Lab resources, researchers characterized a giant - 5,000 ...
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22 Chordates - Cell Press
https://www.cell.com/current-biology/pdf/S0960-9822(05)01326-6.pdf
Some recently discovered fossils strongly indicate that chordates. — at least tunicates and vertebrates — were present by the Early Cambrian. Many of.
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23 Phylum: Chordata - Mt. SAC Faculty Directory
https://faculty.mtsac.edu/trevell/bio2/bio2resources/practiv/fishcards.pdf
Biogeography – Stingrays are found in tropical and subtropical marine waters worldwide, with few species occupying freshwater habitats. The round stingray ...
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24 Chordata - Fossil Wiki | Fandom
https://fossil.fandom.com/wiki/Chordata
All of the earliest chordate fossils have been found in the Early Cambrian Chengjiang fauna, and include two species that are regarded as fish, ...
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25 (PDF) Vertebrates (Chordata) - ResearchGate
https://www.researchgate.net/publication/350823166_Vertebrates_Chordata
have not been found to date. Holocephali is a chimaeriform group com-. posed of 56 living species of chimaeras and. closely related fossils. The ...
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26 Chordate Evolution (1/2) - YouTube
https://www.youtube.com/watch?v=ypYesuV3PoI
EvoBiologist
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27 Hypotheses on the origin and early evolution of chordates in ...
https://www.tandfonline.com/doi/pdf/10.1080/11250009909356245
has been discovered (Lake, 1990; Janvier, 1998; Dzik, in press). However, as we shall see, ... Chordata (some fossil Agnatha) at some stage in their.
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28 Chordata | SpringerLink
https://link.springer.com/10.1007/3-540-31078-9_33
Chordata is a phylum of animals to which the vertebrates and a few related ... In aquatic chordates a series of gill slits are open from the pharnyx to the ...
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29 Topic 3—Chordate Taxonomy and Or
https://uam-web2.uamont.edu/facultyweb/huntj/topic_3chordate_taxonomy_and_or.htm
Acorn worm—common name for members of the Phylum Hemichordata, referring to ... It is found in urochordates, cephalochordates, and some vertebrate larvae, ...
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30 Phylum Chordata Tree of Life - The Virtual Fossil Museum
http://www.fossilmuseum.net/Tree_of_Life/PhylumChordata.htm
From the first dawn of life, all organic beings are found to resemble each ... Phylum Chordata comprises those animals most often occupying the top of the ...
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31 Origin of Chordates - Suneel's Zoology - Google Sites
https://sites.google.com/site/suneelszoology/animal-diversity-chordata/origin-of-chordates
The discovery of fossil echinoderms called Calcichordata from Ordovician period (450 mya) further confirms echinoderm ancestry of chordates. Calcichordates were ...
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32 An animal able to regenerate all of its organ - EurekAlert!
https://www.eurekalert.org/news-releases/873979
"It is an astounding discovery, as this is an animal that belongs to the Phylum Chordata - animals with a dorsal cord - which also includes ...
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33 Interactive Fly, Drosophila - Society for Developmental Biology
https://www.sdbonline.org/sites/fly/aimain/tree.htm
The deuterostome phyla include Echinodermata, Hemichordata, and Chordata. ... Vertebrata is found to be monophyletic and a sister clade to Cephalochordata.
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34 Biology, Biological Diversity, Vertebrates, Chordates - OERTX
https://oertx.highered.texas.gov/courseware/lesson/1757/overview
Extant members of Cephalochordata are the lancelets, named for their blade-like shape. Lancelets are only a few centimeters long and are usually found buried in ...
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35 Biology 2e, Biological Diversity, Vertebrates, Chordates
https://openspace.infohio.org/courseware/lesson/452/overview
The chordates are named for the notochord , which is a flexible, rod-shaped mesodermal structure that is found in the embryonic stage of all chordates and ...
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36 Pikaia: A chordate - Understanding Evolution
https://evolution.berkeley.edu/the-arthropod-story/meet-the-cambrian-critters/pikaia/is-pikaia-an-arthropod/pikaia-a-chordate/
In 1999, researchers discovered fossil chordates in rocks in China that are 10 million years older than Pikaia! Chordates have been around for a long time ...
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37 Chordates - Chordata - The Animal Encyclopedia - ThoughtCo
https://www.thoughtco.com/identifying-chordates-130246
› ... › Animals & Nature
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38 Chordates: We're All Family | the Shape of Life
https://www.shapeoflife.org/video/chordates-we%E2%80%99re-all-family
Amphioxus, a worm like animal, is our ancestor with numerous common features including the precursor to the vertebrate backbone. Some chordates like tunicates, ...
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39 The Origin and Evolution of Vertebrates
http://rcastilho.pt/DA/ewExternalFiles/Cap_34_Cambell.pdf
other end of the spectrum, a fish discovered in 2004 is just ... Vertebrates are members of the phylum Chordata, the chor- dates. Chordates are bilaterian ...
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40 Branches on the Tree of Life DVD – CHORDATES
https://dcmp.org/guides/TID5962.pdf
regarding the origins of the Phylum Chordata. Recent finds in early. Cambrian Chinese fossil beds, have discovered fossil tunicates at least.
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41 Chordata (Vertebrates and relatives) - biodiversity explorer
http://biodiversityexplorer.info/chordata/index.htm
Conodont fossils are found worldwide and in southern Africa are know from the Soom Shale in the Cedarberg (Durand 2005). Conodonts were previously included in ...
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42 Origin of chordata - SlideShare
https://www.slideshare.net/reddysir/origin-of-chordata-239886662
Fossils of 60 specimens from mid-Cambrian of the earliest chordate, Pikaia gracilens have been discovered from Burgess Shale in British Columbia, Canada.
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43 Athena Review 5-1 Records of Life 8: Phylum Chordata
http://www.athenapub.com/aria1/PAL/17Records-08.html
The earliest fish-like creatures were notochords from the Early and Middle Cambrian (535-520 mya). Several early fish-like fossils have been found in the Lower ...
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44 The Global Diversity of Hemichordata | PLOS ONE
https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0162564
Hemichordates are found throughout the world's oceans, with the ... and expect new species of Hemichordata will continue to be discovered ...
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45 Connexins evolved after early chordates lost innexin diversity
https://elifesciences.org/articles/74422
Here, we identified glycosylation sites of 2388 innexins from 174 non-chordate and 276 chordate species. Among all chordates, we found not a ...
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46 The Phylum Chordata Explained - Untamed Science
https://untamedscience.com/phylum/chordata/
Dorsal Neural Tube / Hollow Nerve Chord. A neural tube is found in all chordates. In vertebrates this becomes the spinal cord and brain. Pharyngeal Slits and ...
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47 [PDF] Chordate evolution and the three-phylum system
https://www.semanticscholar.org/paper/Chordate-evolution-and-the-three-phylum-system-Satoh-Rokhsar/03093aa2720b20e3ab645ba5fee4cbdae6672d89
The Chordata, together with the phyla Echinodermata and ... Hemichordates, the phylum of bilateral animals closest to chordates, is found to ...
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48 Human's oldest ancestor found | University of Cambridge
https://www.cam.ac.uk/research/news/humans-oldest-ancestor-found
The research team's analysis proves the extinct Pikaia gracilens is the most primitive member of the chordate family, the group of animals ...
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49 Chordate
https://www.cs.mcgill.ca/~rwest/wikispeedia/wpcd/wp/c/Chordate.htm
In subphylum Cephalochordata, the worm-like lancelets are found. In the subphylum Vertebrata (all animals with vertebrae) classes Myxini (hagfish), Conodonta, ...
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50 Connexins evolved after early chordates lost innexin diversity
https://www.biorxiv.org/content/10.1101/2021.10.08.463644v1.full
Here, we identified glycosylation sites of 2270 innexins from 152 non-chordate and 274 chordate species. Among all chordates, we found not a ...
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51 The Enigmatic Reissner's Fiber and the Origin of Chordates
https://www.frontiersin.org/articles/10.3389/fnana.2021.703835/full
Reissner's fiber (RF) is a secreted filament that floats in the neural canal of chordates. Since its discovery in 1860, there has been no ...
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52 Animals: Vertebrates | Organismal Biology - Georgia Tech
https://organismalbio.biosci.gatech.edu/biodiversity/animals-vertebrates-1-2019/
Place chordates (and vertebrates!) on a phylogenetic tree ... The nerve cord found in most chordate embryos develops into the brain and spinal cord, ...
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53 Human's oldest ancestor found in Burgess Shale
https://www.utoronto.ca/news/human%E2%80%99s-oldest-ancestor-found-burgess-shale
The research team's analysis proves the extinct Pikaia gracilens is the most primitive member of the chordate family, the group of animals ...
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54 Newly discovered gene may give 'sea pickles' their glow
https://www.sciencedaily.com/releases/2020/10/201020131344.htm
If confirmed, the finding would be the first bioluminescent gene identified from a chordate -- the group that includes all vertebrates as ...
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55 Chordates - Biology Questions
https://www.biology-questions-and-answers.com/chordates.html
Hypothesis to be tested: Vertebrates evolved from echinoderms. Testing material: A newly found protochordate species (more specifically, a vertebrate precursor) ...
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56 Echinoderms and Chordates – NSCC Academic Biology 1050
https://pressbooks.nscc.ca/biology1050/chapter/echinoderms-and-chordates/
The majority of species in the phylum Chordata are found in the subphylum Vertebrata, which include many species with which we are familiar.
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57 2. Vertebrate Animals: Chordates 2/13 - LabXchange
https://www.labxchange.org/library/items/lx-pb:19c71983-d36c-3997-bf1b-1cf63130ea69:html:26ec8d7e
Animals in the phylum Chordata share five key chacteristics that ... The notochord, however, is not found in the postembryonic stages of ...
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58 Biology 2e, Biological Diversity, Vertebrates, Chordates
https://opened.cuny.edu/courseware/lesson/753/overview
The chordates are named for the notochord , which is a flexible, rod-shaped mesodermal structure that is found in the embryonic stage of all chordates and ...
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59 15.5 Echinoderms and Chordates – Biology and the Citizen
https://uen.pressbooks.pub/biology1010revision/chapter/echinoderms-and-chordates/
The chordates are named for the notochord, which is a flexible, rod-shaped structure that is found in the embryonic stage of all chordates and in the adult ...
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60 Land Mammals: Phylum Chordata
https://www.dgs.udel.edu/delaware-geology/land-mammals-phylum-chordata
Land mammal fossils were discovered in 1992 in the lower part of the Calvert formation at the Pollack Farm site. During the short time the pit was open, ...
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61 Evolution of Chordates - Video & Lesson Transcript | Study.com
https://study.com/academy/lesson/evolution-of-chordates.html
Chordates are a type of animal subcategory or phylum that includes ... Vertebrates are found all over the world in almost every different ...
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62 GEOL 331/BSCI 333 Principles of Paleontology
https://www.geol.umd.edu/~tholtz/G331/lectures/104vertsI.html
•Chordata, sister taxon of Ambulacraria, contains Cephalochordata, ... In the 1960s clarification came by the discovery of articulated groups of conodonts.
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63 CHORDATA
https://www.eolss.net/sample-chapters/C03/E6-71-90-11.pdf
EVOLUTION OF PHYLOGENTIC TREE OF LIFE – Chordata - Michel Laurin ... discovered in the Early Cambrian of China and looks vaguely like cephalochordates, but.
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64 Chordate origins: Progress since Romer 1971
https://pterosaurheresies.wordpress.com/2020/08/07/chordate-origins-progress-since-romer-1971/
... proposed ancestor of chordates: a round worm (Fig. 2). The most recent progress on this subject can be found in the following citations: ...
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65 ORIGIN OF CHORDATES - ::J. N. College, Madhubani::
http://jncollegemdb.com/studymaterial/01042020/Origin%20of%20Chordates%20Part-I.pdf
chordate as it was the beginning of evolution of more advanced chordates like ... ostrachoderm was discovered from the Ordovician period but it might have.
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66 Chordate - Wikiwand
https://www.wikiwand.com/en/Chordate
Chordate fossils have been found from as early as the Cambrian explosion, 539 million years ago. ... Cladistically (phylogenetically), vertebrates – chordates ...
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67 10 Echinodermata, Hemichordata and Chordata
https://nikolaussucher.github.io/bio-two/echinodermata-hemichordata-and-chordata.html
Echinoderms are found at every ocean depth, from the intertidal zone to the abyssal zone. The phylum contains about 7000 living species, making it the second- ...
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68 Chordate - Definition, Characteristics and Examples
https://biologydictionary.net/chordate/
A chordate is an animal that belongs to the phylum Chordata, ... to the presence of bone or cartilage, their fossils are easily found.
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69 Phylum Chordata "The four distinctive characteristics that ...
https://www.scasd.org/cms/lib5/PA01000006/Centricity/Domain/1496/chordates_fact_sheet.pdf
"The four distinctive characteristics that, taken together, set chordates apart form ... found at some embryonic stage, although they may be altered or may.
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70 Chordata | Encyclopedia.com
https://www.encyclopedia.com/plants-and-animals/animals/vertebrate-zoology/chordata
Chordata (chordates) Large phylum comprising the animals that possess a rod of flexible tissue (notochord), which is protected in higher forms by a vertebral ...
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71 Deuterostome phylogeny reveals monophyletic chordates and ...
https://www.broadinstitute.org/publications/broad3606
Deuterostome phylogeny reveals monophyletic chordates and the new phylum Xenoturbellida. Publication Type, Journal Article. Year of Publication ...
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72 Chordates | Biology for Majors II - Course Hero
https://www.coursehero.com/study-guides/wmopen-biology2/chordates/
This hypothesis is further supported by the discovery of a fossil in China from the genus Haikouella. This organism seems to be an intermediate form between ...
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73 Origin of the Chordate Notochord - MDPI
https://mdpi-res.com/d_attachment/diversity/diversity-13-00462/article_deploy/diversity-13-00462-v2.pdf?version=1632730266
Abstract: The phylum of Chordata is defined based on the discovery of a coelom-like dorsal no- tochord in ascidian and amphioxus embryos.
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74 Ascidians - Urochordata - The Australian Museum
https://australian.museum/learn/animals/sea-squirts/ascidians-urochordata/
Sydney has over 80 species of ascidians. Ascidians belong to the subphylum Urochordata - one of the major groups of the phylum Chordata, which includes the ...
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75 Crash Course: Biology - Chordates (video) - Khan Academy
https://www.khanacademy.org/science/biology/crash-course-bio-ecology/crash-course-biology-science/v/crash-course-biology-123
› science › biology › cra...
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76 Lab 9: Echinoderms and Introduction to the Chordates - Zoo-lab
https://www.uwlax.edu/biology/zoo-lab/lab-9--echinoderms-and-introduction-to-the-chordates/
The Subphylum Cephalochordata contains about 30 species of small animals called lancelets. Although they can swim fairly well, most animals are found with their ...
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77 14.1 – Chordates – Biology 110 PSU Dubois
https://psu.pb.unizin.org/biol110/chapter/chordates/
This hypothesis is further supported by the discovery of a fossil in China from the genus Haikouella. This organism seems to be an intermediate form between ...
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78 Chordata Flashcards - Quizlet
https://quizlet.com/493837086/chordata-flash-cards/
chordate. The name Chordata comes from the ______ that either found in early development or throughout life. notochord. Notochord is a rodlike, ...
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79 Chordates Study Guide - Inspirit
https://www.inspiritvr.com/general-bio/vertebrates/chordates-study-guide
The chordates generally get their name from the term "notochord," a rod-shaped structure found in the embryonic stage of all chordate animals and the adult ...
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80 Structure and function of the notochord: an essential organ for ...
https://journals.biologists.com/dev/article/132/11/2503/52334/Structure-and-function-of-the-notochord-an
One key event during chordate early development is the induction of mesoderm. ... Using frog embryos, Nieuwkoop found that, when left on its own, ...
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81 Primitive Chordates – Origin of Vertebrates - USD Biology
http://www.usdbiology.com/swanson/anat/Primitive%20Chordates%20-%20Origin%20of%20Vertebrates.pptx
... Classification is dynamic, changing as new information is discovered; Currently, ... Phylum Chordata = includes vertebrates and invertebrate chordates ...
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82 Chordates - Salt Marsh Guide
https://www.saltmarshguide.org/guide/identification-guide/chordates/
Chordates. Phylum Chordata. The phylum Chordata includes thousands of species found worldwide, but this guide will only cover a few classes.
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83 150. Chordates - Biology 2e
https://bccampusbiology.pressbooks.tru.ca/chapter/chordates/
The deuterostome phylogenetic tree includes Echinodermata and chordata. ... structure that is found in the embryonic stage of all chordates and in the adult ...
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84 Evolution of a chordate-specific mechanism for myoblast fusion
https://www.science.org/doi/10.1126/sciadv.add2696
Myomaker (MymK) and Myomixer (MymX) are two recently identified muscle-specific fusogens that drive plasma membrane coalescence during ...
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85 Classes Found In The Phylum- Chordata - BirdMan Science
http://birdmanscience.weebly.com/uploads/5/6/5/7/56574945/classes_found_in_phylum_chordata___characteristics.pdf
Classes Found In The Phylum- Chordata. All chordates have a number of structures in common: A notochord (noto = the back; chord = string) is present in all ...
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86 Chordata | FactMonster
https://www.factmonster.com/encyclopedia/ecology/animals/vertebrates/chordata
Chordata kôrdā´tə, –dä´– [key], phylum of animals having a notochord, ... The three features unique to chordates and found in all of them at least during ...
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87 Introduction to Phylum Chordata - Mayfield City Schools
https://www.mayfieldschools.org/Downloads/12-Chordata.pdf
Chordate evolution is a history of innovations that is built upon major invertebrate traits ... mucous secreting structure found in the pharynx floor.
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88 Chordate - New World Encyclopedia
https://www.newworldencyclopedia.org/entry/Chordate
Chordates (phylum Chordata) are a group of animals that includes all the ... In the subphylum Cephalochordata, the worm-like lancelets are found.
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89 Chordata - Biology - Cliffs Notes
https://www.cliffsnotes.com/study-guides/biology/biology/animals-invertebrates/chordata
Both of these groups somewhat resemble tadpoles and are found clinging to rocks in marine environments. The vertebrate chordates are discussed in Chapter 22 ...
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90 This Simple Fish May Have Been One of the First Vertebrates
https://www.the-scientist.com/news-opinion/this-simple-fish-may-have-been-one-of-the-first-vertebrates-70202
He points out that the fossils seem to be missing a notochord—a rod typically found behind the neural tube in chordates, which provides ...
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91 Oldest chordate spawned everything with backbones - Cusabio
https://www.cusabio.com/c-17674.html
Some 505 million years old, it is the oldest known chordate. An analysis of 114 fossils of Pikaia gracilens discovered since.
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92 Phylum Chordata: Meaning, Features and Ancestry | Biology
https://www.biologydiscussion.com/animals-2/phylum-chordata/phylum-chordata-meaning-features-and-ancestry-biology/40429
The Phylum Chordata encompasses a vast group of diverse animals ranging from ... of some lower chordate forms have been discovered in Cambrian strata.
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93 Virtual museum - Chordates - Česká geologická služba
http://muzeum.geology.cz/d.pl?item=39&id=p5042&l=e
All of the earliest chordate fossils have been found in the Early Cambrian Chengjiang fauna, and include two species that are regarded as fish, ...
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94 Structure and function of the notochord: an essential organ for ...
http://dev.biologists.org/content/132/11/2503
One key event during chordate early development is the induction of mesoderm. ... Using frog embryos, Nieuwkoop found that, when left on its own, ...
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95 Paleozoic Era - Evolution: Change: Deep Time
https://www.pbs.org/wgbh/evolution/change/deeptime/paleoz.html
Members of the phylum Chordata, which include humans and all other vertebrates, ... The Burgess Shale rock formation, discovered in 1909 in western Canada, ...
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96 The Origin of Vertebrates, Hemichordates, and How ... - iBiology
https://www.ibiology.org/development-and-stem-cells/hemichordates/
00:09:37.05 which have just been discovered, 00:09:39.09 and not much is known about them. 00:09:41.22 Now, how do we understand chordate origins?
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