Levin, Chapter 12

Test your knowledge by selecting an answer and pressing the Submit answer button.

  1. During which geologic period were crinoids most common?
    Cambrian
    Devonian
    Mississippian
    Pennsylvanian
    Permian

  2. During which geologic period were rugose and tabulate corals the dominant reef formers?
    Cambrian
    Cretaceous
    Precambrian
    Silurian
    Tertiary

  3. During which geologic period were Archaeocyathids the dominant reef formers?
    Cambrian
    Cretaceous
    Precambrian
    Silurian
    Tertiary

  4. During which geologic period were graptolites important index fossils?
    Cambrian
    Devonian
    Mississippian
    Ordovician
    Pennsylvanian

  5. Match each group with the animal phylum it belongs to.
    Anomalocarids
    Conodonts
    Corals
    Crinoids
    Eurypterids
    Graptolites
    Nautiloids
    Placoderms
    Stromatoporoids
    Trilobites
    Arthropoda
    Chordata
    Cnidaria
    Echinodermata
    Hemichordata
    Mollusca
    Porifera
    None of the above

  6. Match each group with when it included the top carnivores of the ocean.
    Anomalocarids
    Eurypterids
    Osteichthyes
    Placoderms
    Cambrian
    Devonian
    Ordovician
    Pennsylvanian

  7. Which geologic period is known as the "Age of Fishes?"
    Cambrian
    Devonian
    Mississippian
    Ordovician
    Silurian

  8. What is significant about the Ostracoderms?
    Cartilaginous fishes
    First jawed fishes
    Gave rise to amphibians
    Jawless fishes
    Most successful group of fishes today

  9. What is significant about the Placoderms?
    Cartilaginous fishes
    First jawed fishes
    Gave rise to amphibians
    Jawless fishes
    Most successful group of fishes today

  10. What is significant about the ray-fin bony fishes?
    Cartilaginous fishes
    Jawless fishes
    First jawed fishes
    Gave rise to amphibians
    Most successful group of fishes today

  11. During which geologic period were eurypterids the dominant carnivores of the ocean?
    Cambrian
    Devonian
    Pennsylvanian
    Precambrian
    Silurian

  12. During which geologic period were placoderms the dominant carnivores of the ocean?
    Cambrian
    Devonian
    Pennsylvanian
    Precambrian
    Silurian

  13. During which geologic period did amphibians first appear in the fossil record?
    Cambrian
    Devonian
    Mississippian
    Pennsylvanian
    Silurian

  14. During which geologic period did reptiles first appear in the fossil record?
    Cambrian
    Devonian
    Mississippian
    Pennsylvanian
    Silurian

  15. What character(s) did the earliest amphibians and the rhipidistian fishes (a group of lobe-fin fishes) have in common?
    Dorsal fins
    Labyrinthodont teeth
    Opercular bones
    Similar appendage bones
    All of the above

  16. What is the main basis for classifying fossil amphibians into subgroups?
    Number of vertebrae in the skeleton
    Skin color and texture
    Structure of the ear region
    Structure of the vertebral centrum
    Temporal openings in the skull

  17. What is the main basis for classifying fossil reptiles into subgroups?
    Number of vertebrae in the skeleton
    Skin color and texture
    Structure of the ear region
    Structure of the vertebral centrum
    Temporal openings in the skull

  18. What was the most crucial character in the origin of reptiles?
    Powerful tails for swimming
    Reduction in size
    Scaly skin
    Temporal openings in the skull
    The amniotic egg

  19. What group of reptiles included the earliest members?
    Anapsids
    Diapsids
    Euryapsids
    Synapsids

  20. Which group of reptiles was most diverse and dominant during the Permian period?
    Anapsids
    Diapsids
    Euryapsids
    Synapsids

  21. What is thought to be the purpose of the "sails" on the backs of Permian reptiles such as Dimetrodon and Edaphosaurus?
    Attracting mates
    Floating across lakes
    Scaring predators
    Splitting logs
    Thermoregulation

  22. Which of the following groups did not go completely extinct at the end of the Permian?
    Brachiopods
    Fusulinids
    Rugose corals
    Tabulate corals
    Trilobites

Please report any errors or problems to Dr. Heaton.
Press here to return to the ESCI 103 Home Page.