WIS2040 Topic 7 Questions and Answers Rated A

WIS2040 Topic 7 Questions and Answers Rated A Fish that live in marine environments and ascend creeks and streams to breed are called anadromous When lampreys reached the upper Great Lakes the ____ fishery collapsed Lake Trout The ____ are chordates that are sessile as adults and/but have a free-swimming larva urochordata Scientists once thought (incorrectly) that Amphioxus was a larval ____ that underwent paedomorphosis Lamprey The sea squirts belong to the subphylum ____ urochordata TFM is a chemical once used to control ____ Lampreys The ____ were the first vertebrates ostracoderms The currently accepted theory among biologists on the evolution of the vertebrates is based on ____'s hypothesis. Garstang The parasitic sea lamprey is characterized by having an oral disk TFM may be replaced in the future by Baylucide When the Welland canal was deepened ____ invaded Lake Erie lampreys All chordates have _____ pharyngeal gill slits ____ use slime production as a defense mechanism hagfish All lampreys are parasitic false ____ refers to the developmental change from juvenile to adult metamorphosis All chordates have ____ dorsal hollow nerve cord Some species of ____ are catadromous species eels The Ostracoderms may have used their bony skin for ____ protection Amphioxus is a typical member of the subphylum ____ cephalochordata Among the vertebrates a prominent notochord is found in adult members of the class ____ Agnatha Natives on the Yukon River harvest nemeryaq which are actually ____ lampreys The phylum chordate is subdivided into __ subphyla 3 The four chordate characteristics are all visible in the adults of all chordate species False There are about __ species of jawless vertebrates in the world today 70 Lampreys are chiefly catadromous false Typically, invertebrates use their gills for ____ feeding Modern hagfishes are found only in ____ environments marine The Ostracoderms may have used the bone in their skin for a ____ mineral reservoir Sea urchins belong to the phylum Echinodermata ____ is the phylum of marine, acorn worms Hemichordata In the vertebrates the gills are internal and ____ connected to the digestive tube