what are the major characteristics of chordates?
180590
Animals in the phylum Chordata share four key features: a notochord, a dorsal hollow nerve cord, pharyngeal slits, and a post-anal tail.
819705
['Physiognomy: ... ', 'Growth-forms and life-forms: ... ', 'Phenology, periodicity or aspection: ... ', 'Stratification: ... ', 'Species abundance and species diversity: ... ', 'Sociability: ... ', 'Vitality: ... ', 'Disseminule type:']
150413
Living species of chordates are classified into three major subphyla: Vertebrata, Urochordata, and Cephalochordata. 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).
1183266
['Live in water their entire lives.', 'Vertebrates have a backbone, and some cartilaginous fish have vertebrae made of cartilage rather than calcium-hardened bone.', 'Gills, which are slits on both sides of fish that allow for respiration, or the exchange of oxygen and carbon dioxide.']
411243
['They do not have a backbone.', 'They are multicellular. ... ', 'They have no cell walls, like all other animals.', 'They reproduce by two reproductive cells, or gametes, coming together to produce a new organism of their species.']
352697
With the exception of some primitive species, most fish have common characteristics that include gills, scales, fins and bony skeletons. Some characteristics that differentiate fish include the shape of their heads, where their mouths are located, fin type and location, and average adult size.
20363
Vertebrates are differentiated by having a vertebral column. As chordates, all vertebrates have a similar anatomy and morphology with the same qualifying characteristics: a notochord, a dorsal hollow nerve cord, pharyngeal slits, and a post-anal tail.
12008
['Endoskeleton made mostly of bone.', 'skin is smooth with many capillaries and pigments, no scales.', 'usually two pairs of limbs with webbed feet.', 'as many as four organs of respiration.', 'a three chambered heart.', 'Oviparious with external fertilization.']
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.
671926
['6 basic features humans share with other vertebrates. - tube within a tube body plan. ... ', 'tube within a tube body plan. inner tube: mouth to anus, respiratory and digestive organs. ... ', 'bilateral symmetry. ... ', 'dorsal hollow nerve cord. ... ', 'notochord and vertebrae. ... ', 'segmentation. ... ', 'pharyngeal pouches.']
1275880
Figure 29.1A. 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.
596594
['Exoskeletons made of chitin.', 'Highly developed sense organs.', 'Jointed limbs (the limbs must be jointed like the joints in a suit of armor, since the exoskeleton is rigid and cannot bend to allow movement)', 'Segmented bodies.', 'Ventral nervous system. ... ', 'Bilateral symmetry.']
1133169
['The individual cells are prokaryotic in nature. ... ', 'Both vegetative and reproductive cells are non-flagellate.', 'Cell wall is made up of microfibrils and is differentiated into four (4) layers. ... ', 'Locomotion is generally absent, but when occurs, it is of gliding or jerky type.']
797595
Like the remaining subphylum of the chordates, the Vertebrata, the protochordates have a hollow dorsal nerve cord, gill slits, and a stiff supporting rod, the notochord, the forerunner of the backbone. The protochordates differ chiefly from the vertebrates in not having a backbone.
1373647
['They are widely distributed, aquatic or terrestrial, parasitic or free-living.', 'Their body is elongated, cylindrical, unsegmented, worm-like, bilaterally symmetrical and tapering at both ends.', 'They are triploblastic animals with perivisceral cavity more extensive than that of platyhelminths.']
516452
['Single-Celled. Perhaps the most straightforward characteristic of bacteria is their existence as single-celled organisms. ... ', 'Absent Organelles. ... ', 'Plasma Membrane. ... ', 'Cell Walls. ... ', 'DNA.']
949520
[' Symmetry of the body.', ' The structure of the body cavity.', ' The segmentation of the body plan.', ' External appendages that are used for sensing, chewing, locomotion, mating, and other functions.', ' The development of a Nervous System.']