Question

the nitrogen cycle
fill in the information about the nitrogen cycle below:

1. ____ enters the living world from the __ via nitrogen - fixing ____
2. this nitrogen and ____ from __ is then processed back into __ nitrogen by ____.
3. soil ____ also supply __ with the ____ nitrogen they need.

Explanation:

1. Nitrogen moves from the atmosphere to living things via nitrogen-fixing bacteria, which convert atmospheric N₂ into usable forms.
2. Nitrogen and waste/decomposing matter from organisms is broken down back into atmospheric nitrogen by denitrifying bacteria.
3. Soil bacteria/plants provide other organisms with the usable (fixed) nitrogen required for biological processes.

Answer:

1. Nitrogen enters the living world from the atmosphere via nitrogen-fixing bacteria
2. This nitrogen and waste matter from living organisms is then processed back into atmospheric nitrogen by denitrifying bacteria
3. Soil bacteria/plants also supply living organisms with the usable (fixed) nitrogen they need.