What structures of the circulatory system carry blood containing carbon dioxide from the body back to the heart ?

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.

What element does susan b. anthony include in this passage to strengthen her argument?

Why does it matter if osmosis is put into a “scab” or a “nosebleed? ” where would that leave him?