All of the following substances move in and out of cells excepts

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

Which statement best describes the relationship between an allele and a gene? question 1 a. an allele is a variation of a gene that can be expressed as a phenotype. b. an allele is the part of a gene that attaches to messenger rna molecules. c. an allele is a segment of a dna molecule that controls replication of a gene.

In the ocean why are the greatest amount of primary producers found in the epipelagic zone and how does that affect biodiversity