Microbiology and Nitrogen Cycle

Archaeoglobus, Desulfobacterium and  Desulfotomaculum use CO₂ from Acetyl-Co A pathway as major C-source.

Yes, it is correct. Veillonella, Peptostreptococcus and Treponema: All are obligate anaerobes.

Yes, it is the correct answer. It has flagella at both sides or ends.

Thiobacterium ferrooxidans is of great economical importance because of their involvement in biological leaching of copper and uranium ores and biooxidation of gold ores.

Yes, it is correct. Escherichia and Paramecium: Neutrophiles (optimum growth between pH 5.5 and 8.0).

Yes, it is correct. Propionibacterium and Treponema are Obligate anaerobes.

Yes, it is correct. Chlamydomonas nivalis is psychrophile (grows at 0°C and has an optimum growth temperature of 15°C or lower).

Rhizobium bacteria live in the root nodules of leguminous plants and convert atmospheric nitrogen into a form the plant can use.

Nitrosomonas is a genus of bacteria that oxidizes ammonia into nitrites, which is the first step of the nitrification process.

Azospirillum is a nitrogen-fixing bacterium that lives in the rhizosphere and forms a loose association with the roots of grasses and cereal crops.

Anabaena is a genus of filamentous cyanobacteria that is capable of nitrogen fixation, often found in symbiotic associations with plants like Azolla.

Nif genes (nitrogen fixation genes) have been transferred to various bacteria to enhance their nitrogen-fixing capabilities, including both Rhizobium and Bradyrhizobium species.

Azotobacter is a free-living, non-symbiotic nitrogen-fixing bacterium, whereas Rhizobium, VAM, and Anabaena are typically associated with symbiotic relationships.

Bacillus subtilis is well-documented as a phosphate-solubilizing bacterium that helps convert insoluble phosphorus into forms available for plant uptake.

Some amount of phosphour, is returned to the earth, in the form of bird's excreta.