Question

Trichodesmium is a nitrogen-fixing cyanobacteria. Why might this cyanobacteria be important to other organisms in nitrogen-poor waters?
They convert atmospheric nitrogen (N2) to organic compounds including ammonia (NH3).
They convert inorganic nitrogen to ammonia (NH3) in the ocean.
They convert organic nitrogen compounds to into other nitrogen compounds. They convert nitrates from the water into nitrogen gas (N2) that is released into the atmosphere.

Answer 1

Answer: They convert atmospheric nitrogen (N₂) to organic compounds including ammonia (NH₃).

Trichodesmium is cyanobacteria which converts atmospheric nitrogen into ammonia which is then used by other organisms present in the nitrogen poor water. They are found in the nutrient poor tropical and sub tropical ocean waters .They account for approximately half of the nitrogen fixation in marine system all over the world.

Answer 2

Cyanobacteria don't need oxygen to survive they produce oxygen. They where the first ever known organisms on the planet and they produced oxygen in the oceans which was absorbed by iron deposits and then once the iron had oxygen the ocean got the oxygen until it got into the atmosphere and Eukaryota bacteria evolved. So the answer would be: They convert nitrates from the water into nitrogen gas (N2) that is released into the atmosphere.