Science include hypothesis
This would be bacteria ; aka a prokaryotic cell
The cell membrane gateway system you are looking for is called <span>Sodium Potassium Pump.</span>
I believe, from my understanding, that Producers take up nitrogen to make amino acids.
It must be a producer as they are often plants in the soil, also, legumes do take up nitrogen, but 'fix' it into ammonia (N2 + 8H+ + 8e− → 2NH3 + H2) via Rhizobia bacterium.
You should you use google the answer is really easy to hide