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Algae are useful for humankind because they:1. help to fix the ozone layer2. help to clean dirty places3. help to create more oxygen4. help to create more carbon dioxide

Answer» Correct Answer - Option 3 : help to create more oxygen

The correct answer is help to create more oxygen.

  • Phytoplanktons are like the terrestrial plants which float on the surface of the water, contain chlorophyll, and using sunlight perform photosynthesis.
  • They produce oxygen as a result.
  • Photosynthetic algae, which includes Phytoplankton, along with bacteria are the main sources of organic matter in the ocean. 
  • But Algae being produced in cold water biomes isn’t connected to Phytoplanktons producing high organic carbon in the ocean. 


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