Marine Biology MCQs

By: Prof. Dr. Fazal Rehman | Last updated: June 11, 2025

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1. : What is the primary focus of marine biology?



2. : Which of the following is a characteristic of plankton?



3. : What is the primary role of phytoplankton in marine ecosystems?



4. : Coral reefs are primarily composed of:



5. : Which of the following is a major threat to coral reefs?



6. : The “benthic zone” in marine environments refers to:



7. : Which type of marine organism is known for its ability to produce bioluminescence?



8. : The term “thermocline” refers to:



9. : Which of the following is a major component of the ocean’s nutrient cycle?



10. : The “pelagic zone” is characterized by:



 

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