Put the steps of the carbon cycle in order using Step 1 as your starting point. Step 1: Bacteria, through nitrogen fixation and nitrification, convert nitrogen into a usable form.

The animal dies and decomposes, returning nitrogen back to the soil.

Once nitrogen is in usable form, it is taken up by plants and assimilated into proteins..

An animal eats a plant and the nitrogen becomes part of the animal’s proteins.