Which of the following can limit the rate of facilitated diffusion? The concentration gradient of the solute.

The permeability of the membrane.

The availability of ATP.

The size of the solute.

the nitrogen cycle provides nitrogen to the ecosystem from the atmosphere, ground and oceans. nitrogen is an important component of complex molecules such as amino acids and nucleotides, which lead to the creation of proteins and dna, the building blocks of all life. plants absorb nitrogen in the form of ammonium, nitrate ion and, on rare occasions, as amino acids. animals receive nitrogen necessary for biological processes from feeding on living or dead organic matter.

a bird that nests only in a particular tree species.