what would you predict the approximate concentration of PCBs in the tissues of a tertiary consumer to be

The rate at which molecules water and oxygen can enter a cell is determined by the-

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

9. wind power creates pollution. water air soil noise