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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) Reduced salinity
B) High pH levels
C) Eutrophication
D) Cold water currents
  • 3. Where are jellyfish blooms most commonly observed?
A) Open ocean
B) Coastal areas
C) High mountain streams
D) Freshwater lakes
  • 4. What does the term 'medusa' refer to?
A) The mature, free-swimming stage of jellyfish.
B) The larvae stage of jellyfish.
C) The polyp stage of jellyfish.
D) A type of jellyfish predator.
  • 5. What adaptation helps jellyfish in open waters?
A) Their ability to swim against strong currents
B) Their strong propulsion ability
C) Their thick gelatinous bodies
D) Their ability to drift with currents
  • 6. Which of the following is a method to study jellyfish migration?
A) Satellite tracking
B) Radioactive tagging
C) Underwater sound monitoring
D) Airborne surveys
  • 7. Which region has reported significant jellyfish blooms?
A) The Black Sea
B) The Arctic Ocean
C) Lake Baikal
D) The Amazon River
  • 8. 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.
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