Chordata (A+ Guaranteed) 2024.

______________ is small fishlike translucent animal that exhibits the five distinctive hallmarks of Phylum Chordata. correct answers Amphioxus Amphioxus has a dorsal tubular nerve cord, supportive notochord, pharyngeal pouches or slits, endostyle for ___________, and a postanal tail for ________________. correct answers feeding, propulsion. Normally found half buried in sand on the sea floor and filters ________________ particles. correct answers organic Very inconspicuous and with no commercial value; useful in ________ correct answers zoology. However, Amphioxus lacks one of the most important vertebrate characteristics: a __________________ with special sense organs. correct answers distinct head This vertebrate adaptation is an important feature to shift to an active form of predation, such that Amphioxus may have diverged from ________________ ancestry. correct answers vertebrate Amphioxus resembles closely the ____________ condition immediately before the origin of vertebrates. correct answers chordate The name Chordata comes from the _____________ that either found in early development or throughout life. correct answers notochord Notochord is a rodlike, semirigid body of fluid-filled cells enclosed in a _____________ sheath that extends the length of body. correct answers fibrous Notochord is usually found above the _____ and just below the nervous system. correct answers gut Mainly serves to ________ the body, providing skeletal scaffolding for the attachment of swimming muscles. correct answers stiffen Traditional _______________ classification is a convenient way to indicate the taxa included in each major group. correct answers Linnaean In cladistic systems, some ___________________ like Reptilia are no longer used. correct answers traditional taxa Reptiles are _____________________ because they do not contain all of the descendants of recent common ancestor. correct answers paraphyletic