What is the formula for iron (ll) sulfide? ?

Which of the rock examples below is most likely to be metamorphic

Ais a landform that is formed at the mouth of a river from the deposition of sediment carried by the river as the water flows.

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.