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Solution


Q.

Which of the following organisms are known as chief producers in the oceans                  [2018]
1 Dinoflagellates  
2 Diatoms  
3 Cyanobacteria  
4 Euglenoids  

Ans.

(2)

Diatoms are the most common form of phytoplankton in the ocean. They have the pigment chlorophyll, which helps in photosynthesis. Since they are the primary producers of the aquatic food chain and the marine ecosystem depends on them, they are called chief producers in the oceans.