One of the freeliving, anaerobic nitrogen fixer is:
Correct answer: B. Rhodospirillum
- A. Beijernickia
- B. Rhodospirillum
- C. Rhizobium
- D. Azotobacter
Explanation
Rhodospirillum is a free living photosynthetic anaerobic nitrogen fixing nonsulphur bacteria. It is capable of synthesizing its organic food in presence of light and in absence of O2 by a process known as bacterial photosynthesis. Beijernickia and Azotobacter are free living but aerobic nitrogen fixing bacteria. Rhizobium is a symbiotic nitrogen fixing bacteria.
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About Biodiversity and Variety of Life
Biological classification uses taxonomic ranks, binomial nomenclature and shared characteristics to organize life into kingdoms. The major groups include prokaryotes, protists, fungi, plants and animals, with comparisons based on cell type, cell wall, nutrition, body organization, reproduction and evolutionary relationships; prokaryotes lack a membrane-bound nucleus.
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