Monday Night Mystery: The Test

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Tonight’s challenge: actual questions from the IB109 Insects & People final exam. How well do you know general entomology?

1. Arthropod exoskeletons are composed primarily of:
a. sericin & fibroin
b. formic & tannic acids
c. deoxyribonucleic acids
d. chitin & sclerotin

2. Dipterans are unique among insects for their in-flight stability and maneuverability. Why?
a. They have halteres that act like gyroscopes
b. They have descending contralateral movement detectors
c. Their ocelli can detect polarized light
d. Their wings are linked with hamuli

3. What does a plastron do?
a. it anchors the honey bee sting in place
b. it shields the flight wings in beetles
c. helps lice grasp the hairs of its host
d. retains air to help aquatic insects breathe

4. How are parasitoids are different from parasites?
a. They are smaller
b. They usually kill their host
c. They prefer to attack aphids
d. all of the above

5. Choose the Muellerian mimic:
a. a hover fly that looks like an aposematic bee
b. a hemipteran that resembles a thorn
c. a toxic viceroy butterfly that looks like a toxic monarch butterfly
d. an ant-eating spider that looks like ants

6. Locusts are defined as grasshoppers that:
a. cause extensive crop damage
b. have a seventeen-year life cycle
c. shift between solitary and gregarious forms
d. are polyphagous

7. Which insect and region of origin are correctly associated?
a. India — lac scale
b. Africa — Aedes albopictus
c. Australia — cochineal scale
d. Mexico — silkworm

8. What is an instar?
a. A discrete developmental stage between molts
b. a young life stage of a hemimetabolous insect
c. a parasite of plant-galling insects
d. a disc of tissue in holometabolous larvae that develops into the adult appendages

9. In which order of insects are all species carnivorous?
a. Hymenoptera
b. Coleoptera
c. Phasmida
d. Odonata

10. Why are giant, 10-foot tall insects thought to be impossible?
a. when they evolve they are immediately killed by the U.S. military
b. their cuticle is incapable of retaining enough moisture
c. their respiratory system is incapable of delivering enough oxygen to their tissues
d. they require more food than is possible for them to catch

I will award one point per question to the first correct answer for each.

The cumulative points winner for the month of December will win their choice of 1) any 8×10-sized print from my photo galleries, or 2) a guest post here on Myrmecos.

Good luck!

[image source]

27 thoughts on “Monday Night Mystery: The Test”

  1. I’m going to start with these two, and post as I go along:
    1. d. chitin & sclerotin
    2. a. They have halteres that act like gyroscopes

      1. 4. b. They usually kill their host
        5. c. a toxic viceroy butterfly that looks like a toxic monarch butterfly
        6. c. shift between solitary and gregarious form

        1. 7. a. India — lac scale
          (But b. Africa — Aedes albopictus is an introduced species there, but it is not its region of origin).
          8. a. A discrete developmental stage between molts
          9. d. Odonata
          10. c. their respiratory system is incapable of delivering enough oxygen to their tissues

  2. Ah, fond memories of taking and teaching entomology courses. (Is there a wistful smiley?)

    By the way, I suggest we bring back the “Hyperoxygenic”, so we wouldn’t even have to ask #10!

    1. Oh yeah, and:
      11. (Fill in) What are the Latin and American and Canadian English names of the organism at the top of the page? (Extra credit for the French one. Extra,extra credit if you know a Spanish one)
      ______________________________________
      ______________________________________
      ______________________________________
      X_____________________________________
      XX____________________________________

      1. Tired of waiting:
        Dissosteira carolina
        Carolina (grass)hopper, black-winged grasshopper (Can.)

        I was hoping to learn the French and Spanish names, but no such luck, I guess.

  3. Pingback: Answer to the Mystery Exam – MYRMECOS - Insect Photography - Insect Pictures

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