Question

Which of the following organism is known as chief producers in the ocean?

• A. Cyanobacteria
• B. Diatoms
• C. Dinoflagellates
• D. Euglenids

Answer 1

The correct option is B

Diatoms

The correct option is B.

The explanation for the correct option:

1. Producers in the ocean are phytoplanktons.
2. Diatoms are one of the classes of phytoplankton and are therefore known as the chief producer of the ocean.
3. Diatoms make the soil gritty which is used for polishing and filtration of oils and syrups.

The explanation for the incorrect options:

Option A

1. Cyanobacteria are the bacteria that live in the ocean and are capable of making their food.
2. They are very small and unicellular but make visible colonies.

Option C

1. Dinoflagellates are single-celled eukaryotes and are usually considered algae.
2. Their population may depend on the factors like sea surface temperature, depth, and salinity.

Option D

1. Euglenids are a well-known group of flagellates and their cell structure is typical of that group.
2. They are found in freshwater whenever it is rich in organic matter.

Final answer: Diatoms are known as chief producers in the ocean.