Exam 2--1997 Entomology 105
Second Hour Exam
April 4, 1997

1. Name two orders of arthropods in which carnivory is always present: (2 points)

2. Two morphological attributes that characterize active predators are: (2 points)

3. Which of the following is an example of cleptoparasitism? (1 point)
a. Parasitoid wasp injects venom into host caterpillar.
b. Vedalia beetles consume entire populations of cottony-cushion scale.
c. Small spiders in barrier webbing steal prey out of web of larger orb-weaver.
d. Belastomatid bugs attack and kill small fish.

4. Two families that contain primarily species that attack sedentary prey are: (2 points)

5. Which of the following statements is true? (1 point)
a. Insects are low in protein.
b. Insects are high in salt and cholesterol.
c. Insects are low in vitamins and minerals.

6. Certain species of primates produce _____________________, an enzyme that allows them to digest insect exoskeletons. (1 point)

7. True or False: According to the Old Testament, termites are kosher. (1 point)

8. Mopane worms are commonly consumed in (1 point)
a. Japan
b. Thailand
c. South Africa
d. Mexico

9. In terms of efficiency of conversion of ingested food, which kind of meat is most energetically efficient to produce? (1 point)
a. beef
b. chicken
c. lamb
d. grasshopper

10. Match the gland with its owner: (3 points)
a. osmeterial gland 1. stink bug
b. oozing gland 2. swallowtail caterpillar
c. reactor gland 3. bombardier beetle

11. True or False: In a Batesian mimicry complex, both the model and the mimic are toxic. (1 point)

12. What is meant by the term "thanatosis"? (1 point)
13. Two insects capable of reflex bleeding are: (2 points)

14. Classify the following as either cryptic, homotypic, or aposematic: (2 points)
a. peppered moth
b. crab spiders that change color to match the background.

15. If you believed in the doctrine of signatures, what insect would you prescribe for baldness? (1 point)
a. earwigs
b. crickets
c. spotted beetles
d. bees

16. The active component of extracts of Spanishfly is a chemical called _______________________.
(1 point)

17. Which of the following insect products acts as a neurotoxin? (1 point)
a. diamphidiatoxin
b. cantharidin
c. allantoin
d. formic acid

18. Bee venom is widely used in the treatment of __________________________________.
(1 point)

19. Mendel's law of ____________________ states that alternative forms of a particular factor (gene) remain discrete during reproduction; his second law, the law of _________________ ___________________, states that different factors are inherited independently of one another.
(2 points)

20. Give an example of a mutation involving a sex-linked gene in Drosophila melanogaster. (1 point)

21. One entomological phenomenon that Darwin had difficulty explaining in his "Origin of Species" was (1 point)
a. sterile workers in social insect colonies.
b. winglessness in island beetles.
c. mimicry in butterflies.
d. crypsis.

22. The physical appearance of an organism is its ________________ while its genetic make-up is its __________________________. (1 point)

23. What does "PCR" stand for? (1 point)

24. Match the method for obtaining oxygen with the insect: (4 points)
a. siphon 1. stonefly nymph
b. plastron 2. rat-tailed maggot
c. tracheal gill 3. aquatic beetle eggs
d. physical gill 4. diving beetle

25. True or False: Oxygen makes up a higher percentage of atmospheric gas under water than it does above the water. (1 point)

26. The gas present in greatest concentration in a physical gill is ___________________________.
(1 point)

27. Why are the back legs of waterboatmen and backswimmers elongate, flattened, and equipped with long fine hairs? (1 point)

28. Two orders in which all immatures stages are aquatic include (2 points)

29. What classic flyfishing test was written by Isaak Walter in 1653? (1 point)
a. "A Treatyse on Fysshynge with an Angle"
b. "The Compleat Angler"
c. "Secrets of Angling"
d. "The Scientific Angler"

30. What is meant by "catch and release" in flyfishing? (1 point)

31. What is the difference between a wet fly and a dry fly? (1 point)

32. Match the fishing fly with the mayfly life stage: (4 points)
a. humpback 1. dead adult
b. drake 2. nymph
c. dun 3. adult
d. spentwing 4. subimago

33. Match the arthropod with the condition it causes: (3 points)
a. dermatosis 1. Dermatobia hominis
b. myiasis 2. dung beetle
c. canthariasis 3. Demodex follicularum

34. True or False: Mycetomes are most often found in species that are parasitic in all stages of life.
(1 point)

35. Identify two aspects of vertebrate blood that make it less than ideal as food for insects: (2 points)

36. Name a mammal that lacks any known arthropod parasites. (1 point)

37. An example of an order with species ectoparasitic as immatures and adults is: (1 point)
a. Phthiraptera
b. Siphonaptera
c. Plecoptera
d. Embioptera

38. To what family do mosquitoes belong? (1 point)
a. Chironomidae
b. Ceratopogonidae
c. Culicidae
d. Chaoboridae

39. Species in the genus _______________________ are principal vectors of yellow fever. (1 point)

40. Yellow fever is caused by a (1 point)
a. rickettsia
b. bacterium
c. protozoan
d. virus

41. Match the man with his contribution: (4 points)
a. William Crawford Gorgas 1. Philadelphia physician who prescribed bloodletting to
cure yellow fever.
b. Benjamin Rush 2. Headed US Army medical team that investigated
mechanism of yellow fever transmission
c. Walter Reed 3. Developed the first yellow fever vaccine.
d. Max Theiler 4. Cleaned up Havana to control yellow fever epidemic.

42. Malaria is caused by a (1 point)
a. rickettsia
b. bacterium
c. protozoan
d. virus

43. Which of the following life stage of Plasmodium occurs only in mosquitoes? (1 point)
a. microgametocyte
b. ookinete
c. sporozoite
d. merozoite

44. Species in the genus _________________ are vectors of malaria. (1 point)

45. Why is malaria known as "intermittent fever"? (1 point)

46. True or False: The mosquito is the definitive host for Plasmodium. (1 point)

47. Yersinia pestis is a (1 point)
a. rickettsia
b. bacterium
c. protozoan
d. virus

48. Where is the inveterate focus of plague? (1 point)

49. True or False: All adult siphonapterans are wingless. (1 point)

50. The common name of Xenopsylla cheopis is (1 point)
a. cat flea
b. Oriental rat flea
c. human flea

51. Why was bubonic plague known as the Black Death? (1 point)

52. True or False: Typhus is fatal to lice. (1 point)

53. Typhus is caused by a (1 point)
a. rickettsia
b. bacterium
c. protozoan
d. virus

54. Lice transmit typhus to humans by (1 point)
a. injecting the pathogen into the feeding site along with saliva.
b. carrying the pathogen from person to person on contaminated mouthparts.
c. contaminating the feeding site with infected frass.
d. infecting local rat populations who pass it along to humans.

55. Match the scientific name with the common name: (3 points)
a. Phthirus pubis 1. Head louse
b. Pediculus humanus humanus 2. Crab louse
c. Pediculus humanus capitis 3. Body louse

56. Two orders that contain many coprophagous species are: (2 points)

57. To meet the energetic needs of their ball-rolling habits, many dung beetles are _________________________. (1 point)

58. Annual dung beetle contributions to the US economy amount to approximately: (1 point)
a. $200,000
b. $2 million
c. $2 billion
d. $2 trillion

59. Due to its dungfeeding habits, the house fly has been implicated as a vector of (1 point)
a. plague
b. epidemic relapsing fever.
c. dysentery.
d. hemmorhagic fever.

60. Match the stage of carrion decomposition with its characteristic insect fauna: (4 points)
a. "Fresh" 1. cheese skippers
b. caseic fermentation 2. sexton beetles
c. ammoniacal fermentation 3. clothes moths
d. dry 4. blow flies

61. Two orders with many truly necrophagous species are: (2 points)

62. Larval dermestids can break down ________________________, the principal component of hair and feathers. (1 point)

63. What effect does cocaine in a corpse have on the ability of a forensic entomologist to estimate post-mortem interval? (1 point)

64. Competition in which all individuals fail to complete optimal development, as can occur in carrion, is known as __________________________ competition. (1 point)

65. What is one disadvantage of eating carrion?

66. Among the odor components of dung to which coprophagous insects orient is the compound (1 point)
a. cholesterol
b. bombykol
c. skatole
d. isopropanol

67. Describe the contributions of the following people to medical entomology (4 points)

a. Charles Rothschild

b. Alexandre Yersin

c. Charles Nicolle

d. Florence Nightingale

68. What is maggot therapy? (1 point)