Azotobacter bacterium is anaerobic/aerobic free living `N_2` fixer.

Name two free-living N_2 -fixing microbes.

Select the correct match Nitrate to nitrite Thiobacillus-Denitrification Nostoc-Free living N_2 fixer Azotobacter-Anaerobic N_2 fixer

Choose the correct alternative: Incineration involves anaerobic/aerobic burning of combustible wastes at high temperature.

Name the free living flatworms.

Differentiate aerobic and anaerobic respiration.

Complete the missing links. …………is a symbiotic N_2 fixer while…………is a free living soil N_2 fixer.

An anaerobic bacterium capable of atmospheric N_2 -fixation is :