Which is a reservoir for nitrogen?
a.
lightning
b.
biomass
c.
nitrogen gas
d.
ammonium
e.
nitrogen-fixing bacteria

In what for do plants utilize nitrogen? why do they need nitrogen?

Where are the strongest jet streams located?

What is it called when part of a cell membrane closes around a molecule to allow the molecule to enter the cell? a. passive transport b. diffusion c. endocytosis d. exocytosisc. endocytosis