Oceanography Final (Exam - Questions, Answers And Feedback) Questions Eens2230 Dr. Agnew Tulane University

These marine mammals use blubber for insulation: A) all marine mammals. B) cetaceans and pinnipeds only. C) cetaceans, sirenians, and pinnipeds. D) cetaceans and sirenians only. {Ans: c}Most molluscs have a radula, a ribbon-like structure that carries rows of small teeth. {Ans: true}Gray whales migrate to Baja California in the winter to feed in the rich tropical waters, then to their summer breeding areas in the northern polar waters. {Ans: false}Lancets (Cephalochordata) are similar to vertebrates in structure except for the lack of a backbone. {Ans: true}The blowhole of cetaceans not only allows for breathing air while most of the body is submerged, but also allows for breathing and swallowing simultaneously. {Ans: true}Dumping of sludge (treated sewage) in the oceans has relatively little effect on marine life compared to dumping of raw sewage. {Ans: false}