Question

Upper part of sea/aquatic ecosystem contains _________.

• A. Plankton
• B. Nekton
• C. Plankton and nekton
• D. None of these

Answer 1

The correct option is A Plankton

• Planktons are passively floating in upper water, nektons are actively swimming while benthos lead sedentary life upon the sea bottom.
  
• Plankton (singular plankter) are a diverse group of organisms that live in the water column of large bodies of water and that cannot swim against a current.
  
• They provide a crucial source of food to many large aquatic organisms, such as fish and whales.