Which law states supports the oldest layers of a rock formation being on the bottom?

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.

This is an active transport mechanism by which cells pump sodium and potassium ions against the concentration gradient

Wich is not standing in the way of astronomers getting a good view of different star