History of Life in the Oceans

Supplemental practice questions written by Dr. Heaton for the lectures on the history of life in the oceans. This practice exam covers all the material you are expected to know on this topic, though don't expect exactly the same questions on the exam. Keep in mind that exam questions could include some of the incorrect answers on this practice exam.

  1. What were the first life forms to inhabit the earth?
    Amoebas
    Bacteria
    Ediacaran organisms
    Jellyfish
    Trilobites

  2. Which type of cell has the more complex construction?
    Eukaryotic
    Prokaryotic

  3. During which geologic era or period did rugose and tabulate corals, bryozoans, and crinoids make up the reefs of the shallow oceans?
    Cambrian
    Cenozoic
    Mesozoic
    Paleozoic
    Precambrian

  4. During which geologic era or period did stromatolites make up the only reefs of the oceans?
    Cambrian
    Cenozoic
    Mesozoic
    Paleozoic
    Precambrian

  5. During which geologic era or period did the Ediacara fauna live?
    Cambrian
    Cenozoic
    Mesozoic
    Paleozoic
    Precambrian

  6. During which geologic era or period did the Burgess Shale fauna live?
    Cambrian
    Cenozoic
    Mesozoic
    Paleozoic
    Precambrian

  7. Which Fauna of animals consists of very thin, quilted, soft-bodied animals?
    Burgess Shale Fauna
    Cambrian Fauna
    Ediacara Fauna
    Paleozoic Fauna
    Tommotian Fauna

  8. Which Burgess Shale animal had five eyes and a long feeding appendage?
    Anomalocaris
    Hallucigenia
    Opabinia
    Pikaia
    Wiwaxia

  9. Which Burgess Shale animal was the top carnivore of its day?
    Anomalocaris
    Hallucigenia
    Opabinia
    Pikaia
    Wiwaxia

  10. What was the character of the Tommotian fauna? (Small means less than 1 cm long; large means more than 1 cm long.)
    Large and skeletonized organisms
    Large and soft-bodied organisms
    Small and skeletonized organisms
    Small and soft-bodied organisms

  11. What was the character of the Ediacara fauna?
    Large and skeletonized organisms
    Large and soft-bodied organisms
    Small and skeletonized organisms
    Small and soft-bodied organisms

  12. During which geologic era or period were eurypterids the top carnivores of the ocean?
    Cambrian
    Cenozoic
    Mesozoic
    Paleozoic
    Precambrian

  13. During which geologic era or period were whales the top carnivores of the oceans?
    Cambrian
    Cenozoic
    Mesozoic
    Paleozoic
    Precambrian

  14. During which geologic era or period were plesiosaurs, ichthyosaurs, and mosasaurs the top carnivores of the oceans?
    Cambrian
    Cenozoic
    Mesozoic
    Paleozoic
    Precambrian

  15. Which of the following animals would you expect to find in rocks of Paleozoic age?
    Ammonoids with complex sutures
    Hexacorals
    Oysters
    Sand dollars
    Trilobites

  16. Which group of fossils represent part of the prehistoric plankton?
    Ammonoids
    Brachiopods
    Crinoids
    Graptolites
    Trilobites

  17. What phylum do eurypterids belong to?
    Arthropoda
    Chordata
    Cnidaria
    Echinodermata
    Mollusca

  18. What phylum do fishes belong to?
    Arthropoda
    Chordata
    Cnidaria
    Echinodermata
    Mollusca

  19. What was the first group of fishes to appear on earth?
    Chondrichthyes
    Osteichthyes
    Ostracoderms
    Placoderms

  20. What group of fishes has no modern members or counterparts?
    Chondrichthyes
    Osteichthyes
    Ostracoderms
    Placoderms

Please report any errors in the exam or problems with the program to Dr. Heaton.
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