Question

The bacteria can chemically combine nitrogen with hydrogen to form ammonia (NH3). This combining process is called nitrogen fixation.

Which group of organisms chemically combines nitrogen with hydrogen in a process called nitrogen fixation?


bacteria


birds and reptiles


only aquatic plants


all mammals

Answer 1

Bacteria

Step-by-step explanation:

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Answer 2

Bacteria

Step-by-step explanation:

Nitrification fixation takes place by nitrogen-fixing bacteria like Azotobacter, Klebsiella, Bacillus etc which convert atmospheric nitrogen gas into fixed-nitrogen compounds like nitrates or ammonium ions for the plants to readily absorb.

The nitrogen fixing bacteria can be free-living like cyanobacteria or live with symbiotic relationship with plants and fungi.

The chemical conversion of di-nitrogen to ammonia takes place with the help of enzymes like nitrogenase in combination with leghahemoglobin, a protein through a reduction reaction.