How many organism in the list given below are `N_2`-fixer autotrophs ?
Azotobacter, Chromatium, Azospirillum, Rhodospirillum, Rhizobium, Nitrobacter, Aulosira, Nostoc, Oscillatoria.
Answers
Answer:
6
Explanation:
Chromium:- chromium fixes the environment nitrogen.
Azospirillum:- it's a Gram-negative, microaerophilic, non-fermentative, and nitrogen-fixing bacterial genus from the family of Rhodospirillaceae.
Rhodospirillum:-Rhodospirillum maybe a purple nonsulfur bacteria which will grow aerobically or anaerobically. it's the facility to live through respiration, fermentation, photosynthesis, or photoautotrophic growth.
Rhizobium:-Rhizobium could also be a genus of Gram-negative soil bacteria that fix nitrogen. Rhizobium species form an endosymbiotic nitrogen-fixing association with roots of legumes and Parasponia.
Nitrobacter:-It is a chemoautotroph which is a negative bacteria. The name is derived from a Latin word that means alkalis. They fertilize by budding and nonmotile.
Aulosira:- it is a blue-green alga, which is usually found in paddy fields, different species of Aulosira are found on stones, mountains, lakes, etc.
Nostoc:- it can be found on different lands like moist rock, the bottom of lakes, and springs. It is a cyanobacterium that can be found in different habitats.