14. Among modern animals, the closest relatives of the Permian pelycosaurs like
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14. Among modern animals, the closest relatives of the Permian pelycosaurs like A. crocodiles B. turtles C. lizards D. mammals Dimetrodon are the: 15. Milankovitch cycles were probably an important factor in the formation of B. intracratonic basins C.reefs A. cyclothems D. stromatolites E. all of the above 16. Pygidium, cephalon and thorax are parts of the body of a: A. crinoid B. trilobite C.cephalopod D. conodont 17. Which of the following groups is truly a living fossil, having changed hardly at all in more than 500 million years of life history? A. sharks B. trilobites C archeocyathids D. inarticulate brachiopods 18. What is special about the Burgess Shale in Canada? A. volcanic ash beds B. phosphate rich D. first dinosaurs C.remarkable preservation of soft-bodied organisms 19. One of the distinctive fossils of the late Paleozoic is a group of single-celled organisms that built football-shaped skeletons of calcite, the: A. fusulinids B. arthrodires C. archeocyathids D. midi-chlorians 20. The best record of late Permian therapsids is found around the: A. AppalachiansB. Canadian shield D. Michigan basin C. Urals III Answer each of the following questions. Use diagrams as needed or helpful. Late Cambrian trilobites in eastern Massachusetts are completely different from the trilobite fauna of the same age in western Massachusetts. The same 2 trilobite faunas are found in eastern and western Newfoundland and in northern and southern Scandinavia. Explain how this came to be. 1. (10) What were the Ancestral Rockies or Paleorockies? When and where did they form and what is the evidence that they existed? 2. When does the earliest record of terrestrial organisms occur in the fossil record? What kinds of organisms are they? 3.Explanation / Answer
14.Among mordern animals, the closest relative of Permian Pelycosaur like Dimetrodon are mammals. They are more related to mammals(not their ancestor) than to any other reptiles.
15. Milankovitch cycle are important factor in the formation of cyclothems. Cyclothems are the alternating stratigraphy of marine and non marine sediments. By comparison of the thickness of the Milankovitch cycles, we can study the sedimentation rates of different environments.
16. Pygidium, thorax and cephalon are parts of the body of a trilobite. The trilobite is divided into mainly three main sections, other than the three longitudinal lobes.
17. Goblin shark is a living fossil. It hardly changed for over a large span of time.
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