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