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Assessment
What role do phytoplankton play in the marine food chain?
Primary producers
Top predators
Decomposers
Herbivores
Which of the following organisms is a secondary consumer in the marine food chain?
Krill
Phytoplankton
Blue whale
Coral
What is the primary function of decomposers in marine ecosystems?
Breaking down dead matter
Producing oxygen
Consuming primary producers
Filtering seawater
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