Section 2 â¢ Invertebrate Chordates 803 Chordates are animal s belonging to the phylum Chordata (kor DAH tuh) that have four distinctive featuresâa dorsal tubular nerve cord, a notochord, pharyngeal pouches, and a postanal tailâat some point during their development.ost chordates are vertebrates. Invertebrate chordates, which belong to two of the subphyla of chordatesâCephalochordata and Urochordata, also have a dorsal tubular nerve cord, a notochord, pharyngeal pouches, a postanal tail, and, possibly, an ancestral thyroid gland. They ha ve no backbone, however.
quack 1. (kwÄk) n. The characteristic sound uttered by a duck. intr.v. quacked, quackÂ·ing, quacks. To utter the characteristic sound of a duck.
Noun. 1. barrack-a building or group of buildings used to house military personnel. casern-military barracks in a garrison town.arÂ·rack 1. tr.v. barÂ·racked, barÂ·rackÂ·ing, barÂ·racks. To house (soldiers, for example) in quarters. n. often barracks. 1. A building or group of buildings used to house military personnel. 2. A large, unadorned building used for temporary occupancy.