Correct Answer - Option 3 : Cyanobacterial
The correct answer is Cyanobacterial.
- Cyanobacteria have a unique ecological role in aquatic ecosystems, as they are the only group of organisms on Earth that can fix both inorganic carbon and nitrogen in an anoxic (oxygen-containing) environment.
- Nitrification is the process in which the ammonia is converted into Nitrate.
- Nitrification is a two-step process and based upon these two steps, the bacteria are divided into Nitrosifying and Nitrite-Oxidizing bacteria.
- An example of Nitrosifying bacteria is Nitrosomonas, which converts ammonia (NH3) into Nitrite (NO2-).
- An example of Nitrite-Oxidizing bacteria is Nitrobacter which is able to oxidize the Nitrite and crate Nitrate (NO3-).