Mammalogy Fall 2008 Exam 1

  1. On the pelycosaur skeleton above (8 points)
    1. Label the feature (A) that most indicates that this fossil is more closely related to mammals than reptiles. (1 point)
    2. What is this feature? (1 point)
    3. Label a feature (C) that is more reptile-like than mammal-like. (1 point)
    4. Why is feature C more reptile-like than mammal-like (2 points)
    5. Label another feature (E) that is more reptile-like than mammal-like. (1 point)
    6. Why is feature E more reptile-like than mammal-like (2 points)
  2. List three [diagnostic] mammalian characters that are related to endothermy (3 points)
  3. Briefly explain how each of these three is related to endothermy (6 points)
  4. List from most inclusive to least inclusive the seven fundamental Linnean categories. (7 points)
  5. Answer ONE of the following (a, b, or c) 20 POINTS
    1. What are multituberculates? Why are multituberculates considered the most successful group of mammals? Why are mutituberculates used as example of both ecomorphy and competitive replacement?
    2. Discuss the Australian zoogeographic realm. What are the three most most important land masses that comprise it? How does geology explain the high degree of endemism seen in Australian mammals?
    3. Define, illustrate with a cladogram, and give example an example of a monophyletic group. A paraphyletic group. A polyphyletic group.
    4. Match the name with the picture (2 points each)
      1. Didelphidae ____
      2. Ornithorhynchidae ______
      3. Dasyuridae ______
      4. Notoryctidae _____
      5. Vombatidae _____

MULTIPLE CHOICE, SELECT THE BEST ANSWER. 2 points each

  1. The white tailed deer is Odocoileus virginianus.  virginianus is the
  2. A mammal with a well-developed tapetum lucidum is
  3. Monotremes differ from most other living mammals in possessing (a)
  4. Which of the following helps a prey species warn predators to not try to eat it?
  5. Which of the following has the best-developed sense of electroreception
  6. The type of molars found in the earliest placental and marsupial mammals
  7. The kangaroo digestive system is most similar to that of a
  8. Which of the following morphological characteristics is related to a fossorial lifestyle?

Answer THREE of the following (10 points each, 30 points total)

  1. What is the difference between a classification and a taxonomic key? What are some of the problems of using common names to name mammals?
  2. Describe two methods from start to finish for determining the home range of a small mammal.
  3. What is the Biological Species definition? Why is it a useful definition? What if any drawbacks does it have?
  4. Why do kangaroos have an advantage over ecomorphs such as deer during times of severe drought?
  5. What is semelparous reproduction? Under what conditions is it advantageous for a species to evolve semelparous reproduction?
  6. What is the trophoblast? What are its major functions? Why are these functions essential for reproduction in eutherians?