4. Nitrogen gas is more abundant in our atmosphere than
oxygen! However, nitrogen needs to be converted into
different forms to be used by many organisms. Bacteria are
highly involved in this! Describe the role of (A) bacteria
fixing nitrogen as they live symbiotically with some plant
species, (B) nitrifying bacteria, and (C) denitrifying bacteria
in the nitrogen cycle.

Answer:The symbiotic nitrogen-fixing bacteria invade the root hairs of host plants, where they multiply and stimulate formation of root nodules, enlargements of plant cells and bacteria in intimate association. Within the nodules the bacteria convert free nitrogen to ammonia, which the host plant utilizes for its development.

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pstnonsonjoku pstnonsonjoku · Answer 2 · 2022-01-11T13:34:11+01:00

Nitrogen cycle refers to the movement of nitrogen in nature.

The biogeochemical cycle refers to the movement of matter through the ecosystem. The nitrogen cycle has atmospheric, lithospheric and hydrospheric components.

Nitrogen exists in the atmosphere as nitrogen gas N2, nitrifying bacteria such as nitrosomonas traps this atmospheric nitrogen and converts it to nitrates which is fixed in soil. These bacteria live symbiotically in the root noodles of leguminous plants.

Denitrifying bacteria such as Micrococcus denitrificans converts these nitrates in soil back to atmospheric nitrogen thereby releasing nitrogen back to the atmosphere.

Learn more about the nitrogen cycle: https://brainly.com/question/9243222