Water Quality Bugs

10 Questions | Total Attempts: 376

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Water Quality Bugs

This is a test on the macroinvertebrates that are used to measure water quality.


Questions and Answers
  • 1. 
    Which of the following macroinvertebrates is in Class I, the most pollution sensitive?
    • A. 

      Damselfly

    • B. 

      Stonefly

    • C. 

      Deer/horse fly

    • D. 

      Leech

  • 2. 
    Which type of snail is more intolerant of pollution?
    • A. 

      Gilled snails

    • B. 

      Air Breathing snail

    • C. 

      Their tolerance is the same

    • D. 

      There is no such thing as gilled snails

  • 3. 
    Which macroinvertebrate nymph is up to 2 inches long, has large eyes, a large round abdomen, six legs, and is class 2  or moderately sensitive to pollution?
    • A. 

      Scud

    • B. 

      Damselfly

    • C. 

      Caddisfly

    • D. 

      Dragonfly

  • 4. 
    Which aquatic macroinvertebrate is up to 1 inch long, has six hooked legs on the upper third of its body, is class I, and may have the lower part of its body in a case covered in sticks, rocks or leaves?
    • A. 

      Caddisfly larva

    • B. 

      Netspinner larva

    • C. 

      Stonefly larva

    • D. 

      Tubifex

  • 5. 
    Which aquatic macroinvertebrate is not an insect, has a soft, flat body with an arrow-shaped head with two eyespots?
    • A. 

      Leech

    • B. 

      Flatworm or planaria

    • C. 

      Black fly larva

    • D. 

      Scud

  • 6. 
    Which of the following aquatic macroinvertebrates is NOT is the class 3, moderately tolerant group: midge, water mite, leeches, flatworm, water penny, blackfly
  • 7. 
    What body part is the best way to tell a damselfly larva from a dragonfly larva?
  • 8. 
    This class II bug resembles its land relative, the roly-poly.
  • 9. 
    The crane fly larva, the horse fly larva, the leech and the aquatic worm are similar to each other in that they all lack prolegs as well as legs.
    • A. 

      True

    • B. 

      False

  • 10. 
    A pond is sampled for macroinvertebrates, and 3 blackfly larvae, 10 water striders, 12 mosquito larvae, 5 leeches, 2 backswimmers and 1 scud are found. This part of the water test indicates that the water is virtually free of pollution.
    • A. 

      True

    • B. 

      False

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