MARINE BIOLOGY
11th Edition
ISBN: 9781259880032
Author: CASTRO
Publisher: RENT MCG
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Textbook Question
Chapter 2, Problem 3CT
Scientists who study forms of marine life that lived more than 200 million years ago usually obtain fossils not from the sea floor, but from areas that were once under sea and have been uplifted onto the continents. Why?
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- why is it not 55-34; Eocene if the Eocene period was 55 million - 34 million years ago as opposed to the Paleocene which was 65 million - 55 million years ago?arrow_forwardDuring what era did pangs begin to break up? A. Cretaceous B. Triassicarrow_forwardThe greatest mass extinction episode in the history of life occurred at what boundary? (a) Pliocene–Pleistocene (b) Permian–Triassic (c) Mesozoic–Cenozoic (d) Cambrian– Ordovician (e) Triassic–Jurassicarrow_forward
- Geologic changes often accompany mass extinction of life forms. Why do you think this is true?arrow_forwardEuprimates appeared about ____ million years ago. This time period is called the ____. a. 65-55; Eocene b. 65-55; Paleocene c. 55-34; Paleocene d. 55-34; Eocene e. 34-24; Oligocenearrow_forwardFor about how many years of geological time have the dinosours existed on earth?? Did dinosours exist at the same time as humans? How do scientists determine when an era begins and when it ends? What is the purpose of making a geological timelinearrow_forward
- Fossils show that dinosaurs originated between 200 and 250 million years ago. Would you expect the geographic distribution of early dinosaur fossils to be on multiple continents or on a single continent? Explain. Hint: refer to continental drift in your explanation.arrow_forwardA great adaptive radiation of animals that occurred during the _______ gave rise to modern animal lineages. a. Precambrian c. Cambrian b. Ediacaran d. Jurassicarrow_forwardWhich of the following was not present by the end of Precambrian? a. archaea c. fungi b. bacteria d. fisharrow_forward
- During the Precambrian, _______. a. atmospheric oxygen concentration declined b. bacteria, archaea, and early eukaryotes arose c. dinosaurs became extinct d. all of the abovearrow_forwardWhich of the following statements is incorrect in the context of fossilization? Minerals dissolved in the water gradually replace minerals in bones Sediments that slowly accumulate on top of the site extert increasing pressure Extreme pressure transforms the mineralized remains into rock. Impressions form detailed imprints of only external structures. Mineral particles settle out of the groundwater and crystallize inside cavities.arrow_forwardWhat is the study of fossils called? Mention any three points how the fossils throw light on past life?arrow_forward
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