<span>Linus Pauling
Hope this helped. Good luck!</span>
For each of the examples, simple diffusion, carrier, and channel mediated, each type involves the flow down a concentration gradient. This means that the molecules flow from an area of high concentration to an area of low concentration. In turn, this allows for a passive process, meaning no ATP is needed! I hope this explains your question.
Answer:
Plants can't use N2 as is so the first option is wrong. They do have relationships with bacteria that live in nodules of the root and convert the nitrogen into ammonia, a usable form for the plants. So the second option is correct. There are bacteria living in the soil as well that convert nitrogen to ammonia so technically option 3 is also correct. Again, nitrogen if present in water would be in the form N2 which is not usable by plants so 4 is wrong.
These are correct:
use bacteria to convert nitrogen to usable form
In obtain usable nitrogen compounds from the soil
I... I didn't remember much
I just seen her dead in there...
It definitely stood out
I remember her smell and her touch
The way she used to talk to me
It all hurts so much now
How could I waste so much time on someone who doesn't even love me?
In the end all the time I spent, it's all pointless
Now I feel like I don't even wanna live anymore
Save me
