what are the distinguishing characteristics of chordates?
70676
1: Defining characteristics of chordates: 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.
1051229
['They are eukaryotic, which means they have a nucleus.', 'Most have mitochondria.', 'They can be parasites.', 'They all prefer aquatic or moist environments.']
5631
All vertebrate embryos have gill arches, notochords, spinal cords, and prenephrotic kidneys. Less general characteristics are developed from the more general, until finally the most specialised appear. Still developing vertebrates have the same type of skin.
314558
Vertebrates are all chordates that have a backbone. The other two subphyla are invertebrate chordates that lack a backbone. Members of the subphylum Urochordata are tunicates (also called sea squirts). Members of the subphylum Cephalochordata are lancelets.
1210583
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.
1378944
It was recognised that echinoderms, hemichordates and chordates – including vertebrates – were members of one evolutionary line, the deuterostomes, when all three groups were found to share the following four, basic developmental features: All are triploblastic: their three-layered bodies derive from three germ layers.
283198
['Radially Symmetrical.', 'Body multicellular, few tissues, some organelles.', 'Body contains an internal cavity and a mouth.', 'Two different forms exist, medusa and polyp.', 'Reproduction is asexual or sexual.', 'Has a simple net like nervous system.', 'Has a distinct larval stage which is planktonic.']
894771
The notochord runs beneath the dorsal nerve cord, which is another chordate feature. This is in contrast to organisms such as annelids and arthropods, in which the main nerve cord is ventral. ... In most land- living chordates, the "gill slits" are present only in embryonic stages; you had pharyngeal slits at one time.
1327427
Invertebrates are “animals without a backbone”. ... chordates are animals that possess a notochord. All vertebrates( snakes,reptiles , amphibians etc), sea squirts(tunicates), lancelets(cephalochordates) fall under chordates. Non chordates are animals that do not possess any notochord.
1288734
Characteristics of Agnathans As the most primitive members of the vertebrates, agnathans differ from all others in several important respects. First, they lack hinged upper and lower jaws and instead have unhinged circular mouths. They also lack the paired appendages (fins or limbs) that are found in other vertebrates.
1427826
There are a few groups of chordates that do not possess a backbone (these organisms are not vertebrates and are instead referred to as invertebrate chordates). The animal classes that are vertebrates include: ... Cartilaginous fish (Class Chondrichthyes) Bony fish (Class Osteichthyes)
294778
Chordates and the Evolution of Vertebrates The most familiar group of chordates is the vertebrates. However, in addition to the subphylum Vertebrata, the phylum Chordata also contains two subphylums of invertebrates: Urochordata and Cephalochordata.
995041
All chordates share four common characteristics: a nerve cord, a notochord, pharyngeal slits, and a postanal tail. Chordates, including humans, are also all classified as having bilateral symmetry and can be divided into a left and right side.
1350871
Main characteristics of Mollusca : Unsegmented soft body with bilateral symmetry. Presence of an internal or external shell. A toothed tongue (made mostly of chitin) called the radula. A mantle which is a fold in the body wall that lines the shell.
810062
The Phylum Echinodermata is distinguished by characteristics such as spiny-skin, pentaradial symmetry, and an endoskeleton composed of calcareous ossicles. Given that all species in this phylum are exclusively marine dwellers, they also evolved a specialized water-vascular system.
1051277
Vertebrates are a subphylum of the phylum Chordata. Like all chordates, vertebrates have a notochord, a dorsal hollow nerve cord, pharyngeal slits, and a post-anal tail.
478626
['Skeleton is made of cartilage rather than bone.', 'Five to seven gill openings on each side.', 'Rigid dorsal fins (and spines if present)', 'Spiracles to aid in breathing.', 'Placoid scales (dermal denticles)', 'The upper jaw of elasmobranchs is not fused to their skull.']