A) scales B) jaws C) vertebrae D) dorsal, hollow nerve cord E) four-chambered heart, What is one characteristic that separates chordates from all other animals? There are three subphylum's which are Urochordata (Tunicata) or tunicates, Cephalochordata or lancelets, and Vertebrata (Craniata) or vertebrates. . a. stinging cells b. notochords c. fivefold symmetry d. zooids e. encrusting forms 22. crayfish. Some other defining characteristics of some chordates include a complete digestive system, an endostyle, segmentation, and bilateral symmetry. E). Do Humans Have an Open or Closed Circulatory System? roundworms Chapter 19, Lecture 1 12/4/ The Evolution of Vertebrate Diversity. In chordates the main nerve cord is single and lies above the alimentary tract, while in other phyla it is paired and lies below the gut. By studying the embryonic stages of organisms, scientists are able to link certain traits and find similar ancestors for organisms that may not have extensive fossilized records. Enrolling in a course lets you earn progress by passing quizzes and exams. The diaphragm is present in only in mammals, which separates thorax and abdomen. a notochord, central nervous system, pharyngeal gill-clefts, and a post-anal tail. The densely branched network of fungal filaments is a __________. Animals in the phylum Chordata share four key features that appear at some stage during their development: a notochord, a dorsal hollow nerve cord, pharyngeal slits, and a post-anal tail (Figure 2). Sometimes this feature is only present in embryos. The correct option is D. hair. B) have true tissues. It is located between the digestive tube and the nerve cord, and provides skeletal support through the length of the body. Mouth and anus are the same opening. copyright 2003-2023 Study.com. The common ancestor of all animals is likely to have been a ________. Chordata: More on Morphology. These are the Tunicate, the Cephalochordata, and the Craniata. Urochordata, which means "tail chordates," also called tunicates, is a subphylum of Chordates. Animals in the phylum Chordata share four key features that appear at some stage during their development: a notochord, a dorsal hollow nerve cord, pharyngeal slits, and a post-anal tail (Figure 2). Which animals have a cylindrical body that is tapered at both ends? It is a mechanism for the dispersal of seeds. The nerve cord found in most chordate embryos develops into the brain and spinal cord, which comprise the central nervous system. The embryology of all chordates is similar which is what makes this phylum so unique. the . Platyhelminthes Overview, Characteristics & Examples | What are Platyhelminthes? A notochord, a dorsal hollow nerve cord, pharyngeal slits, and a post-anal tail 2) From Figure 11.1, starting with Tunicates and ending with Tetrapods, list each clade and identify as: Aquatic-marine, Aquatic-freshwater, or Terrestrial. Ex. Notochord. All chordates possess a notochord that is present at some point in their life cycle. In chordates, it is located dorsally (at the top of the animal) to the notochord. The first class has the most common, diverse, and most studied members. Why are bryophytes considered incompletely liberated from their ancestral aquatic habitat? The free-floating ones are called salps. Which characteristic is common to all chordates? Chordates are common in all major habitats. Tunicates are marine animals, either benthic (bottom dwellers) or pelagic (inhabitants of open water), that often form colonies by asexual reproduction. In angiosperms, the male gametophyte develops within ________. Classification of Chordata has been difficult because of the lack of a fossil record due to the soft tissue of Chordata. Adaptations that evolved in the group of animals called the _____ have allowed them to complete their life cycles entirely on land, An _____ is an organism that generates heat within its body, An _____ is an organism that must obtain heat from the environment, A group of animals called ______ have several adaptations for living on land but must return to the water to breed, The _____, a key adaptation for reptiles, has a waterproof shell that encloses the embryo and its life-support system. As you continue walking, you observe that if a blue fungus and a pink plant are growing side by side, they are both much larger than if the fungus and the plant are farther apart. The chordates are named for the notochord: a flexible, rod-shaped structure that is found in the embryonic stage of all chordates and also in the adult stage of some chordate species. Internal fertilization, viviparity (giving birth to young that have undergone embryological development), and parental care are common in tunicates and vertebrates. The earth's crust is broken up into a series of more-or-less rigid plates that slide around due to motion of material in the mantle below. Which characteristic is common to all chordates? have a water vascular system that functions in locomotion feeding, and gas exchange, are the simplest bilaterian animals and lack a body cavity. Some have the ability to shoot jets of water through siphons when disturbed. The larvae look similar to tadpoles. Vertebrates are much more complex and, in keeping with their more active manner of obtaining food, highly varied in their ecology and habits. Vertebrates are differentiated by having a vertebral column. Subphylum Vertebrata or Craniata are known as vertebrates, Vertebrata means backboned in Latin. . As they mature, they lose the ability to swim and anchor themselves to a rock or similar hard surface. Chordates are bilaterally symmetrical, which means there is a line of . In these animals, the pharyngeal slits develop into the jaw and inner ear bones. Legal. succeed. Arthropod Types & Examples | What is an Arthropod? The post-anal tail is a posterior elongation of the body, extending beyond the anus. Get a Britannica Premium subscription and gain access to exclusive content. B) Nitrogen. Usually, the nerve cord runs the length of the body and enlarges at one end to form a brain. An error occurred trying to load this video. 19 Shared Derived Characters Define the (FIVE) Major Clades of Chordates. Hagfish have partial skulls but no vertebrae, so they are not vertebrates. They all have a notochord sometime during the life cycle. That is, which of the following configurations could result in the dissociation of an excited molecule? Although the speeds of these plates vary somewhat, they are typically about 5cm/yr5 \mathrm{~cm} / \mathrm{yr}5cm/yr. A fish that has a bony skeleton and thin, flexible support in its fins is known as a ________, The gas-filled sac found in many fished is called a _____. D). Other ways scientists often trace the lineage of organisms is by looking at common traits and by studying the embryonic or early stages of development. One unique feature is that the notochord and nerve cord, which are found along the entire length of the body, persist throughout life even in the adult phase. The male gametophytes of flowering plants are also referred to as _____, In flowering plants the integuments of the ovule develop into a(n) _____, In flowering plants one megaspore gives rise to _____ nuclei, In angiosperms, pollination is the transfer of pollen grain to the _____ of a flower on the same plant or another plant of the same species, In mosses gametes are produced by ______; in ferns gametes are produced by ______, The conspicuous part of a fern plant is a, The sperm produced by mosses require ______ to reach an archegonium, In the moss life cycle _____ cells within a sporangium undergo _____ to produce _____ spores, In pines, the female gametophyte contains _____, each of which contains a(n) _____, In pine trees, pollen grains get to the ovule via the _____, Of the four haploid cells produced by a pine cone's megasporocyte (megaspore mother cell), _____ survive(s), In the pine, microsporangia form _____ microspores by _____. Vertebrate chordates have a backbone. Which phylum includes animals that have the following characteristics: a dorsal, hollow nerve cord; a notochord; pharyngeal gill slits; and a post-anal tail? bird This phylum gets its name, which in Latin means chord, from the unique notochord characteristic that all organisms in this phylum possess at some point in their life cycle. Larvae use notochords to _____. If seed production had never evolved, which organisms would be missing in today's landscape? Question 14 0 / 6.667 points Which characteristic is common to all chordates? These traits are observed at some point during the development of the organisms. Evolution of Invertebrates: Timeline & Features | How Invertebrates Evolved. Some features of chordates differ based on the species, and some chordate organisms may lack one or more of the defining characteristics. This superclass is vast with seven distinct classes which are class Chondrichthyes, Actinopterygii, Sarcopterygii, Amphibia, Reptilia, Aves, and Mammalia. Which phylum does the organism you unearthed belong to? Typically the pouch serves as the muscle between the mouth and esophagus. ________ are the mammalian group that lays eggs. Tunicates only have all five characteristics of chordates while in their infantile larval form. While every effort has been made to follow citation style rules, there may be some discrepancies. Notochord. The pharynx is Greek for throat and provides a passage for carbon dioxide, oxygen, and organic matter taken in for sustenance. In some chordates, the notochord acts as the primary axial support of the body throughout the animals lifetime. In some groups, some of these are present only during embryonic development. There are about 25 species of Cephalochordata. All chordates fall into the domain of Eukarya, kingdom Animalia, and phylum Chordata. Subphylum Urochordata, or Tunicata, are known as Tunicates, Urochordata means characterized by tail and cord in Greek. Figure 29.1 D. 1: Phylum chordata: All chordates are deuterostomes, possessing a notochord. that sifts small food particles from the water. The stationary stage of the cnidarian life cycle is the ________ stage. Which of the following is a fungal infection commonly found on the feet of humans? This page titled 29.1A: Characteristics of Chordata is shared under a CC BY-SA 4.0 license and was authored, remixed, and/or curated by Boundless. Anatomical terminology . In its primitive form, fertilization occurs externally, in the water. are sessile animals that have specialized cells called amoebocytes and choanocytes. 241 lessons. An ilectomy is the surgical removal of the last portion of the small intestine _________________. Describe the distinguishing characteristics of chordates; Deuterostomes include the phyla Echinodermata and Chordata (which includes the vertebrates) and two smaller phyla. D) They all have an exoskeleton sometime during their life cycle. Vertebrates also have respiratory systems, closed circulatory systems, genital and excretory systems and digestive tracts. C) Organisms take in energy and use it to perform all of life's activities. Almost every element of bird anatomy is modified for what? Question 5. They have a partial skull but no vertebrae because their skeleton is made of cartilage, and they have no jaws. C) Glucose. All chordates fall into the domain of Eukarya, kingdom Animalia, and phylum Chordata. If the 5.0cm/yr5.0 \mathrm{~cm} / \mathrm{yr}5.0cm/yr velocity continues, how many years will it take before Los Angeles has moved up to San Francisco? Which group of fishes includes a lineage that migrated out of fresh water and adapted to life on land? Introduction. All organisms in the phylum Chordata possess a notochord at some point in their life cycle. The uptake of small nutrient molecules from the environment is known as ____. This is a unique feature because most adult chordates will not exhibit these traits but instead will either lose them or the traits will be morphed into other systems serving new functions. In chordates, four common features appear at some point during development: a notochord, a dorsal hollow nerve cord, pharyngeal slits, and a post-anal tail. Chordates (Chordata) are a group of animals that includes vertebrates, tunicates, lancelets. Other modifications, such as an egg that could develop on land, also emancipated the vertebrates from water. Characteristics of Chordata. Chordates are capable of locomotion by means of muscular movements at some stage in life. Explanation: Echinoderms hemichordates and chordates all have organ system level of organisation. Both are primitive marine organisms. The LibreTexts libraries arePowered by NICE CXone Expertand are supported by the Department of Education Open Textbook Pilot Project, the UC Davis Office of the Provost, the UC Davis Library, the California State University Affordable Learning Solutions Program, and Merlot. An ancestral chordate, as suggested by the adult lancelet and the tadpole larva of tunicates, had a distinct front and hind end, an anterior mouth, a posterior tail above an anus, unpaired fins, and gill slits that opened directly to the exterior. (b) Los Angeles is presently 550km550 \mathrm{~km}550km south of San Francisco, but is on a plate moving northward relative to San Francisco. This phylum gets its name, which in Latin means chord, from the unique notochord characteristic that all organisms in this phylum possess at some point in their life cycle. Water from the mouth enters the pharyngeal slits, which filter out food particles. Vertebrates range in size from tiny fish to the whales, which include the largest animals ever to have existed. Most members of which class of chordates exhibit a mixture of aquatic and terrestrial adaptations? Among vertebrates, the unique feature of lampreys and hagfish is the _____. What evidence would convince you that it is an annelid and not a roundworm or flatworm? As the name implies, at some time in the life cycle a chordate . Water from the mouth enters the pharyngeal slits, which filter out food particles. The oldest known fossil chordate is Pikaia gracilens, a primitive cephalochordate dated to approximately 505 million years ago. In contrast to the chordates, other animal phyla are characterized by solid nerve cords that are located either ventrally or laterally. What phylum does this newly discovered organism belong to? B) Living things exhibit complex but ordered organization. Elaboration of the locomotory apparatus and other developments allowed a diversification of structure and function that produced the amphibians, reptiles, birds, and mammals. In either case, they are filter feeders with simple behaviour. In some terrestrial vertebrates, the tail also helps with balance, courting, and signaling when danger is near. In contrast, the larvae - reminiscent of a small tadpole - possess all five characteristics of chordates. Which group of plants lack vascular tissue? Exploring in the tropics, you discover a nonvascular plant that produces pollen. All of these characteristics are observed at some point in chordate development. Chordates, including humans, all have four common evolutionary characteristics-a dorsal nerve cord, a notochord, pharyngeal gill slits, and a post-anal tail. A) have pseudocoeloms. Cephalochordates develop in the open water, but as adults they lie partially or entirely buried in sand and gravel. Which mode of nutrition characteristic distinguishes animals from other eukaryotes? Let's find out what groups make up the Chordata phylum. Movement of the ______ allows some fish to breathe without swimming. The phylum contains about 7,000 living species, making it the second-largest grouping of deuterostomes, after the chordates.They are characterized by a spiny, calcareous endoskeleton that supports their body shape and provides protection from predators. Producing millions of spores is an important evolutionary adaptation of fungi because ________. Please refer to the appropriate style manual or other sources if you have any questions. flatworms It is located between the digestive tube and the nerve cord, providing skeletal support through the length of the body. The adult looks like a bag enclosed in a slightly harder covering (the tunic) with two siphons for water to enter and exit. Assume that this rate remains constant over time. In other words, the notochord provides a structure for the body to which other systems can attach while the dorsal nerve cord provides information via specialized nerves. 1: Defining characteristics of chordates: In chordates, four common features appear at some point during development: a notochord, a dorsal hollow nerve cord . Why did Shubin and Daeschler search in the Canadian arctic for fossil evidence of the transition from fish to tetrapods? Chordates are animals that belong to the phylum Chordata. What type of symmetry does a jellyfish exhibit? Among vertebrates, the unique feature of . Tunicates are considered acraniate chordates because tunicates and chordates have the following features in common: a notochord. A(n) ________ is an example of a chordate that is not a vertebrate. There are two superclasses of vertebrates which are Agnatha, meaning without a jaw, and Gnathostomata, meaning jawed mouth. Its like a teacher waved a magic wand and did the work for me. Like plants, fungi have ______; however, in plants they are composed of ______, whereas in fungi they are composed of ______. Imagine that you are a paleontologist. All invertebrate chordates share four main characteristics: a notochord, a dorsal nerve tube, a post-anal tail, and pharyngeal gill slits. They all have a notochord sometime during their life cycle. (1s)2(1s)2(2s)1(2s)1\left(\sigma_{1 s}\right)^{2}\left(\sigma_{1 s}^{*}\right)^{2}\left(\sigma_{2 s}\right)^{1}\left(\sigma_{2 s}^{*}\right)^{1}(1s)2(1s)2(2s)1(2s)1 c. (1s)2(1s)2(2s)2(2s)2(2p)4(2p)1\left(\sigma_{1 s}\right)^{2}\left(\sigma_{1 s}^{*}\right)^{2}\left(\sigma_{2 s}\right)^{2}\left(\sigma_{2 s}^{*}\right)^{2}\left(\pi_{2 p}\right)^{4}\left(\pi_{2 p}^{*}\right)^{1}(1s)2(1s)2(2s)2(2s)2(2p)4(2p)1 d. (1s)2(1s)2(2s)2(2s)2(2p)4(2p)4(2p)1\left(\sigma_{1 s}\right)^{2}\left(\sigma_{1 s}^{*}\right)^{2}\left(\sigma_{2 s}\right)^{2}\left(\sigma_{2 s}^{*}\right)^{2}\left(\pi_{2 p}\right)^{4}\left(\pi_{2 p}^{*}\right)^{4}\left(\sigma_{2 p}^{*}\right)^{1}(1s)2(1s)2(2s)2(2s)2(2p)4(2p)4(2p)1. Chordates: Chordates are the species that belong to the Phylum Chordata. Cephalochordates range from one to three centimetres. A free-swimming tunicate larva metamorphoses into an attached, sessile adult with an atrium that surrounds the gills. There are two main sections of the pharynx in chordates that include the pharyngeal gill slits and the pharyngeal pouches. She has a bachelor of science degree in environmental management from Columbia Southern University and a master of science degree in coastal and marine environments from the University of Ireland, Galway. A) Water. frequency for silver. Indeed, most of the animals on exhibit at any zoo are chordates. heterotrophs that acquire their nutrients by absorption, threadlike filaments that make up fungal bodies. The defining characteristics that nearly all chordates share include three main traits. 180 seconds. Gnathostomata includes jawed fishes and tetrapods, which is a four-footed animal usually referencing any land-dwelling animal except for humans who walk on two feet. spores can germinate only in the right environmental conditions (moist, where there is food), so producing many spores increases the chances that at least one will end up in an area of those conditions. An 11-page reading and worksheet that covers two major topics: (1) chordates and their features and (2) the taxonomy of vertebrates, which includes their general characteristics, structure and function, unique adaptations, and 5 major groups.Contents:Page 1-7: Reading ExerciseReview of the 3 domain system of classificationAnimals: An Introduction2 major categories of animals (invertebrates . ________ is an example of an element. 1. What else would you expect to find in this organism? I feel like its a lifeline. These characteristics are only present during embryonic development in some chordates. So far, it appears that the nearest relative of the craniates are the Cephalochordates. The feeding apparatus in cephalochordates is similar. In organisms that live in aquatic environments, pharyngeal slits allow for the exit of water that enters the mouth during feeding. What name is given to the food-trapping cells of sponges? Data for the photoelectric effect of silver are Class Osteichthyes Characteristics & Examples | What is Osteichthyes? This muscle helps to push food into the digestive tract or stomach cavity. As an adult, Tunicata lose their notochord and dorsal nerve cord. C) formed when a zygote develops into a blastula. The sea squirt is mostly just a mass of transparent jelly with no brain and no sensory organs, and a polar bear has four legs, fur, and excellent senses of smell, eyesight, and hearing. have a pseudocoelom and are the simplest animals that have a complete digestive tract. (2) Dorsal nerve cord. The current theory of classification is that Chordata contains all the descendants (offspring) of a single common ancestor who was a chordate, although we don't yet know who that ancestor was. Some classifications also include the phylum Hemichordata with the chordates. After you are done reviewing this lesson, you should be able to: To unlock this lesson you must be a Study.com Member. The dorsal hollow nerve cord develops into the central nervous system: the brain and spine. Chapter 34 Vertebrates Multiple-Choice Questions 1) Which of the following is a shared characteristic of all chordates A) scales B) jaws C) vertebrae Medical Technology 90% (10) 15 The filtered water then collects in the atrium and . Which characteristic is common to all chordates? Characteristics of Chordata. All Cnidaria have _____. The notochord is a cord-shaped structure made of cartilage that is surrounded by a casing of cells and forms the axis, or central part of the body, of all chordates. Because of the unique diversity of this phylum, the habitats that these organisms inhabit are immensely varied. notochord. Among vertebrates, the unique feature of lampreys and hagfish is the ________. The evolutionary linkage between echinoderms hemichordates and chordates can be found out by the similarity in their characteristics due to the same arisal from the same type of organisms. Echinoderms and chordates have a common connection in which the blastopore develops into the _____. In other words, the notochord provides a structure for the body to which other systems can attach while the dorsal nerve cord provides information via specialized nerves. All other trademarks and copyrights are the property of their respective owners. Most deuterostomes have true tissues. The purpose of the notochord is to provide a substrate for organs to attach to and create a fixed structure and shape for the organism to take hold. Most of the 2000 species belong to the taxon Ascidiacea (sea squirts). perch. As embryos, they are quite similar, however, these animals are very different from each other as adults. Adult lancelets retain the four key features of chordates: a notochord, a dorsal hollow nerve cord, pharyngeal slits, and a post-anal tail. Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree. Understand what Chordates are, and see the classification and features of chordates. . Gametophytes are ________; sporophytes are ________. lancelet. B) completely lined with tissue derived from mesoderm. Animals from phylum Platyhelminthes to chordates have what type of germ layer. While on a biological expedition, you discover a new species with the following characteristics: it has an exoskeleton, exhibits bilateral symmetry, and has jointed appendages. Single, hollow nerve cord beneath dorsal surface; in vertebrates, it differentiates into brain and spinal cord 2. In some groups, some of these key chacteristics are present . Amphibians Characteristics & Examples | What Are Amphibians? Part complete Sea stars and sand dollars belong to a group of spiny marine animals called __________. What is a Mammal? It is developed within the endostyle. . A notochord is a rod-like structure that supports the shape of . An object is placed to the left of the lens, and the lens forms an image of the object that is 18.0 cm from the lens. The chordates are named for the notochord: a flexible, rod-shaped structure that is found in the embryonic stage of all chordates and also in the adult stage of some chordate species. Cephalochordates and vertebrates are segmented, as are the annelids and their relatives; however, segmentation in the two groups probably evolved independently. Which characteristic is common to all chordates? In angiosperms, the ________ is a nutrient-storing tissue that nourishes a developing embryo. So are most of the animals featured on nature programs on television. Some tunicate characteristics include a notochord and nerve cord in the larval stage, which they lose once they have become adults. Flatworms are similar to cnidarians in that both ______. A _____ is an animal that has a backbone in addition to displaying the four features of all chordates, A _____ is an example of an animal that is a chordate but not a vertebrate, An _____ is an animal that lacks a backbone and may or may not have all of the chordate features. exhibit two radial body forms, the polyp and the medusa, and use stinging cells to capture prey. Hemichordates have no tail above the gut and no mucus-secreting endostyle between the gill slits. Accessibility StatementFor more information contact us atinfo@libretexts.orgor check out our status page at https://status.libretexts.org. All rights reserved. Bilateral symmetry with organ system level of organisation and joint appendages are characteristic features of . The post-anal tail is present in all chordates at some point in their life cycle. Selected "Derived" Characters- characteristics or traits that separate members of one group of individuals apart from other individuals or groups Can be. Tunicate larvae either seek out a place where they can attach and metamorphose into an adult or develop into adults that float in the open water. Consider the equation: HA(aq)+H2OH3O+(aq)+\mathrm{HA}(a q)+\mathrm{H}_2 \mathrm{O} \rightleftharpoons \mathrm{H}_3 \mathrm{O}^{+}(a q)+HA(aq)+H2OH3O+(aq)+ A(aq)\mathrm{A}^{-}(a q)A(aq) In some groups, some of these are present only during embryonic development. We also acknowledge previous National Science Foundation support under grant numbers 1246120, 1525057, and 1413739. 37 Which of the following is NOT a shared characteristic of all chordates? Chordate definition is, the animal which have presence of notochord or backbone in their body structure is known as chordate. B) They all exhibit radial symmetry. Which mode of nutrition characteristic distinguishes animals from other eukaryotes? Shown above are four of the major characteristics: the pituitary gland (thyroid), dorsal nerve cord, pharyngeal slits (gill slits), and notochord. Much of the coal we use today came from ______ that lived during the Carboniferous. John David Jackson, Patricia Meglich, Robert Mathis, Sean Valentine, David N. Shier, Jackie L. Butler, Ricki Lewis, Living In The Environment: Principles Connections And Solutions Global Environment. They all have an exoskeleton sometime . { "29.1A:_Characteristics_of_Chordata" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "29.1B:_Chordates_and_the_Evolution_of_Vertebrates" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "29.1C:_The_Evolution_of_Craniata_and_Vertebrata" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "29.1D:_Characteristics_of_Vertebrates" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()" }, { "29.01:_Chordates" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "29.02:_Fishes" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "29.03:_Amphibians" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "29.04:_Reptiles" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "29.05:_Birds" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "29.06:_Mammals" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "29.07:_The_Evolution_of_Primates" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()" }, [ "article:topic", "authorname:boundless", "showtoc:no", "license:ccbysa", "columns:two", "cssprint:dense", "licenseversion:40" ], https://bio.libretexts.org/@app/auth/3/login?returnto=https%3A%2F%2Fbio.libretexts.org%2FBookshelves%2FIntroductory_and_General_Biology%2FBook%253A_General_Biology_(Boundless)%2F29%253A_Vertebrates%2F29.01%253A_Chordates%2F29.1A%253A_Characteristics_of_Chordata, \( \newcommand{\vecs}[1]{\overset { \scriptstyle \rightharpoonup} {\mathbf{#1}}}\) \( \newcommand{\vecd}[1]{\overset{-\!-\!\rightharpoonup}{\vphantom{a}\smash{#1}}} \)\(\newcommand{\id}{\mathrm{id}}\) \( \newcommand{\Span}{\mathrm{span}}\) \( \newcommand{\kernel}{\mathrm{null}\,}\) \( \newcommand{\range}{\mathrm{range}\,}\) \( \newcommand{\RealPart}{\mathrm{Re}}\) \( \newcommand{\ImaginaryPart}{\mathrm{Im}}\) \( \newcommand{\Argument}{\mathrm{Arg}}\) \( \newcommand{\norm}[1]{\| #1 \|}\) \( \newcommand{\inner}[2]{\langle #1, #2 \rangle}\) \( \newcommand{\Span}{\mathrm{span}}\) \(\newcommand{\id}{\mathrm{id}}\) \( \newcommand{\Span}{\mathrm{span}}\) \( \newcommand{\kernel}{\mathrm{null}\,}\) \( \newcommand{\range}{\mathrm{range}\,}\) \( \newcommand{\RealPart}{\mathrm{Re}}\) \( \newcommand{\ImaginaryPart}{\mathrm{Im}}\) \( \newcommand{\Argument}{\mathrm{Arg}}\) \( \newcommand{\norm}[1]{\| #1 \|}\) \( \newcommand{\inner}[2]{\langle #1, #2 \rangle}\) \( \newcommand{\Span}{\mathrm{span}}\)\(\newcommand{\AA}{\unicode[.8,0]{x212B}}\), 29.1B: Chordates and the Evolution of Vertebrates, status page at https://status.libretexts.org, Identify the key features of the chordates.