Unusual Animal Migrations: Jellyfish Blooms

Unusual Animal Migrations: Jellyfish Blooms - Exam

1. What ecological role do jellyfish blooms play?

A) They filter pollutants from water.
B) They can provide food for certain species.
C) They eliminate oxygen from water.
D) They act as predators to most fish.

2. Which factor can lead to increased jellyfish populations?

A) High pH levels
B) Cold water currents
C) Reduced salinity
D) Eutrophication

3. Where are jellyfish blooms most commonly observed?

A) Coastal areas
B) High mountain streams
C) Freshwater lakes
D) Open ocean

4. What does the term 'medusa' refer to?

A) The larvae stage of jellyfish.
B) A type of jellyfish predator.
C) The polyp stage of jellyfish.
D) The mature, free-swimming stage of jellyfish.

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) Airborne surveys
B) Underwater sound monitoring
C) Satellite tracking
D) Radioactive tagging

7. Which region has reported significant jellyfish blooms?

A) The Arctic Ocean
B) The Amazon River
C) The Black Sea
D) Lake Baikal

8. Why do jellyfish have a high reproductive potential?

A) They can reproduce both sexually and asexually.
B) They require complex mating rituals.
C) They have a slow growth rate.
D) They migrate during breeding season.

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