What cellular process allows unicellular organisms to reproduce?

What is histamine and what is its role in allergic reactions

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.

Other than earth, is also known to have magnetic pole reversal? a: venus b: mars c: earths moon d: the sun