What types of proteins are synthesized by the rough ER?

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.

Which could be a pathway of food through an ecosystem

Which of the following is the earliest era of earth's geologic time scale? cenozoic mesozoic precambrian paleozoic