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Unusual Animal Migrations: Jellyfish Blooms - Exam
  • 1. What ecological role do jellyfish blooms play?
A) They act as predators to most fish.
B) They eliminate oxygen from water.
C) They can provide food for certain species.
D) They filter pollutants from water.
  • 2. Which factor can lead to increased jellyfish populations?
A) Eutrophication
B) High pH levels
C) Cold water currents
D) Reduced salinity
  • 3. Where are jellyfish blooms most commonly observed?
A) Freshwater lakes
B) Coastal areas
C) Open ocean
D) High mountain streams
  • 4. Which of the following is a method to study jellyfish migration?
A) Underwater sound monitoring
B) Radioactive tagging
C) Satellite tracking
D) Airborne surveys
  • 5. Which region has reported significant jellyfish blooms?
A) The Black Sea
B) The Arctic Ocean
C) The Amazon River
D) Lake Baikal
  • 6. Why do jellyfish have a high reproductive potential?
A) They migrate during breeding season.
B) They have a slow growth rate.
C) They require complex mating rituals.
D) They can reproduce both sexually and asexually.
  • 7. What does the term 'medusa' refer to?
A) A type of jellyfish predator.
B) The mature, free-swimming stage of jellyfish.
C) The larvae stage of jellyfish.
D) The polyp stage of jellyfish.
  • 8. What adaptation helps jellyfish in open waters?
A) Their thick gelatinous bodies
B) Their ability to drift with currents
C) Their ability to swim against strong currents
D) Their strong propulsion ability
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