Some bacteria live in the roots of plants like soybeans and peas. what is the role of these bacteria in the nitrogen cycle? to absorb nitrogen-containing compounds from the soil to release free nitrogen into the atmosphere to break down nitrogen-containing compounds in dead organisms to convert free nitrogen into usable nitrogen

The correct answer would be "to convert free nitrogen into usable nitrogen".

Symbiotic bacteria such as Rhizobium live in the roots of the plants like soybean and peas help in the process of biological nitrogen fixation.

It is the process by which bacteria convert the atmospheric nitrogen to the form which can be used easily by the plants. In return, they get energy-producing nutrients such as glucose.

The reaction is usually catalyzed by the enzyme nitrogenase.

The chemical reaction can be written as:

N₂ + 16ATP + 8e⁻ + 8H⁺ → 2NH₃ + H₂ + 16ADP + 16Pi

a community that experiences major changes undergoes progress

the second type of galaxy is called a barred spiral, which has a thing called a bar straddling the nucleus