All vertebrates are chordates but all chordates are not vertebrates justify the statement

Learning Objectives By the end of this section, you will have completed the following objectives: • Describe the distinguishing characteristics of chordates • Identify the derived character of craniates that sets them apart from other chordates • Describe the developmental fate of the notochord in vertebrates Vertebrates are members of the kingdom Animalia and the phylum Chordata (Figure 1). Recall that animals that possess bilateral symmetry can be divided into two groups—protostomes and deuterostomes—based on their patterns of embryonic development. The deuterostomes, whose name translates as “second mouth,” consist of two phyla: Chordata and Echinodermata. Echinoderms are invertebrate marine animals that have pentaradial symmetry and a spiny body covering, a group that includes sea stars, sea urchins, and sea cucumbers. The most conspicuous and familiar members of Chordata are vertebrates, but this phylum also includes two groups of invertebrate chordates. Figure 1. All chordates are deuterostomes possessing a notochord. Characteristics of Chordata 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). In some groups, some of these are present only during embryonic development. 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 adu...

Phylum Chordata • The notochord provides skeletal support, gives the phylum its name, and develops into the vertebral column in vertebrates. • The dorsal hollow nerve cord develops into the central nervous system: the brain and spine. • Pharyngeal slits are openings in the pharynx that develop into gill arches in bony fish and into the jaw and inner ear in terrestrial animals. • The post-anal tail is a skeletal extension of the posterior end of the body, being absent in humans and apes, although present during embryonic development. • They are mostly marine, soft, unsegmented, triploblastic body having bilateral symmetry • Developed coelom and possess notochord only in the embryonic stage • The body has three distinct parts i.e., proboscis, collar and trunk • Reproduction: Sexual • For examples, Balanoglossus, Herdmania, Amphioxus Which of the following statements is (are) not true? (A) In Urochordata, the notochord is present only in the larval tail. (B) In Cephalochordata, notochord extends from head to tail region. (C) Branchiostoma belongs to Hemichordata (D) Only one class of living members, class Cyclostomata represents the superclass Agnatha. Which of the following statements are true for the phylum-Chordata? a)In Urochordata notochord extends from head to tail and it is present throughout their life. b)In Vertebrata notochord is present during the embryonic period only. c)Central nervous system is dorsal and hollow. d)Chordata is divided into 3 subphyla : Hemichord...

[ "article:topic", "authorname:openstax", "notochord", "Chordata", "Cephalochordata", "Craniata", "cranium", "dorsal hollow nerve cord", "lancelet", "pharyngeal slit", "post-anal tail", "tetrapod", "tunicate", "Urochordata", "vertebral column", "Vertebrata", "showtoc:no", "license:ccby", "transcluded:yes", "source[1]-bio-1974", "program:openstax", "source[1]-bio-74315" ] Skills to Develop • Describe the distinguishing characteristics of chordates • Identify the derived character of craniates that sets them apart from other chordates • Describe the developmental fate of the notochord in vertebrates Vertebrates are members of the kingdom Animalia and the phylum Chordata (Figure \(\PageIndex\): All chordates are deuterostomes possessing a notochord. Characteristics of Chordata 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 \(\PageIndex\)). In some groups, some of these are present only during embryonic development. 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 stage of some chordate species. It is located between the digestive tube and the nerve cord, and provides skeletal support through the length of the body. In some chordates, the notochord acts as the primary axial support of the body throughout the animal’s lifetime....

chordate, any member of the phylum Chordata, which includes the vertebrates (subphylum Vertebrata), the most highly evolved animals, as well as two other subphyla—the tunicates (subphylum Tunicata) and cephalochordates (subphylum Cephalochordata). Some As the name implies, at some time in the life cycle a chordate possesses a stiff, dorsal supporting rod (the notochord). Also characteristic of the chordates are a General features Tunicates are small animals, typically one to five centimetres (0.4 to 2.0 inches) long, with a minimum length of about one millimetre (0.04 inch) and a maximum length slightly more than 20 centimetres; colonies may grow to 18 metres (59 feet) in length. Tunicates are marine animals, either benthic (bottom dwellers) or pelagic (inhabitants of open water), that often form colonies by asexual reproduction. They feed by taking water in through the mouth, using the Match the Baby Animal to Its Mama Quiz Vertebrates retain traces of a feeding apparatus like that of tunicates and cephalochordates. The gill slits, however, ceased to function as feeding structures, and then later as respiratory devices, as the Natural history Reproduction and life cycle The chordate life cycle begins with fertilization (the union of sperm and egg). In its primitive form, fertilization occurs externally, in the water. Asexual reproduction takes place in tunicates and in some vertebrates (females of some fish and lizards can reproduce without fertilization). Hermaphroditism...

Answer The characteristic features of the phylum Chordata include the presence of a notochord and paired pharyngeal gill slits. In sub-phylum Vertebrata, the notochord present in embryos gets replaced by a cartilaginous or bony vertebral column in adults. But in cephelochordates, notochord persists throughout life as such and in urochordates, notochord is present only in larval stages and absent in adults. Thus, it can be said that all vertebrates are chordates but all chordates are not vertebrates. Recently Viewed Questions of Class 11 Biology • Q:- • Q:- How are polysaccharides and disaccharides digested? • Q:- • Q:- • Q:- Define sliding filament theory of muscle contraction. • Q:- • Q:- Bile juice contains no digestive enzymes, yet it is important for digestion. Why? • Q:- Choose the correct answer among the following: (a) Gastric juice contains (i) pepsin, lipase and rennin (ii) trypsin lipase and rennin (iii) trypsin, pepsin and lipase (iv) trypsin, pepsin and renin (b) Succus entericus is the name given to (i) a junction between ileum and large intestine (ii) intestinal juice (iii) swelling in the gut (iv) appendix • Q:- How does butter in your food gets digested and absorbed in the body? • Q:-

Categories • • (32.0k) • (8.8k) • (764k) • (261k) • (257k) • (218k) • (248k) • (2.9k) • (5.2k) • (664) • (121k) • (72.1k) • (3.8k) • (19.6k) • (1.4k) • (14.2k) • (12.5k) • (9.3k) • (7.7k) • (3.9k) • (6.7k) • (63.8k) • (26.6k) • (23.7k) • (14.6k) • (25.7k) • (530) • (84) • (766) • (49.1k) • (63.8k) • (1.8k) • (59.3k) • (24.5k)

Answer The characteristic features of the phylum Chordata include the presence of a notochord and paired pharyngeal gill slits. In sub-phylum Vertebrata, the notochord present in embryos gets replaced by a cartilaginous or bony vertebral column in adults. But in cephelochordates, notochord persists throughout life as such and in urochordates, notochord is present only in larval stages and absent in adults. Thus, it can be said that all vertebrates are chordates but all chordates are not vertebrates. Recently Viewed Questions of Class 11 Biology • Q:- • Q:- (i)red algae and brown algae (ii) liverworts and moss (iii) homosporous and heterosporous pteridophyte (iv) syngamy and triple fusion • Q:- • Q:- Cell is the basic unit of life. Discuss in brief. • Q:- • Q:- How are polysaccharides and disaccharides digested? • Q:- • Q:- • Q:- Define sliding filament theory of muscle contraction. • Q:-

chordate, any member of the phylum Chordata, which includes the vertebrates (subphylum Vertebrata), the most highly evolved animals, as well as two other subphyla—the tunicates (subphylum Tunicata) and cephalochordates (subphylum Cephalochordata). Some As the name implies, at some time in the life cycle a chordate possesses a stiff, dorsal supporting rod (the notochord). Also characteristic of the chordates are a General features Tunicates are small animals, typically one to five centimetres (0.4 to 2.0 inches) long, with a minimum length of about one millimetre (0.04 inch) and a maximum length slightly more than 20 centimetres; colonies may grow to 18 metres (59 feet) in length. Tunicates are marine animals, either benthic (bottom dwellers) or pelagic (inhabitants of open water), that often form colonies by asexual reproduction. They feed by taking water in through the mouth, using the Animal Group Names Vertebrates retain traces of a feeding apparatus like that of tunicates and cephalochordates. The gill slits, however, ceased to function as feeding structures, and then later as respiratory devices, as the Natural history Reproduction and life cycle The chordate life cycle begins with fertilization (the union of sperm and egg). In its primitive form, fertilization occurs externally, in the water. Asexual reproduction takes place in tunicates and in some vertebrates (females of some fish and lizards can reproduce without fertilization). Hermaphroditism (possessing both ma...

[ "article:topic", "authorname:openstax", "notochord", "Chordata", "Cephalochordata", "Craniata", "cranium", "dorsal hollow nerve cord", "lancelet", "pharyngeal slit", "post-anal tail", "tetrapod", "tunicate", "Urochordata", "vertebral column", "Vertebrata", "showtoc:no", "license:ccby", "transcluded:yes", "source[1]-bio-1974", "program:openstax", "source[1]-bio-74315" ] Skills to Develop • Describe the distinguishing characteristics of chordates • Identify the derived character of craniates that sets them apart from other chordates • Describe the developmental fate of the notochord in vertebrates Vertebrates are members of the kingdom Animalia and the phylum Chordata (Figure \(\PageIndex\): All chordates are deuterostomes possessing a notochord. Characteristics of Chordata 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 \(\PageIndex\)). In some groups, some of these are present only during embryonic development. 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 stage of some chordate species. It is located between the digestive tube and the nerve cord, and provides skeletal support through the length of the body. In some chordates, the notochord acts as the primary axial support of the body throughout the animal’s lifetime....

Learning Objectives By the end of this section, you will have completed the following objectives: • Describe the distinguishing characteristics of chordates • Identify the derived character of craniates that sets them apart from other chordates • Describe the developmental fate of the notochord in vertebrates Vertebrates are members of the kingdom Animalia and the phylum Chordata (Figure 1). Recall that animals that possess bilateral symmetry can be divided into two groups—protostomes and deuterostomes—based on their patterns of embryonic development. The deuterostomes, whose name translates as “second mouth,” consist of two phyla: Chordata and Echinodermata. Echinoderms are invertebrate marine animals that have pentaradial symmetry and a spiny body covering, a group that includes sea stars, sea urchins, and sea cucumbers. The most conspicuous and familiar members of Chordata are vertebrates, but this phylum also includes two groups of invertebrate chordates. Figure 1. All chordates are deuterostomes possessing a notochord. Characteristics of Chordata 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). In some groups, some of these are present only during embryonic development. 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 adu...