What do stem cells have to do with cell differentiation?
(long answer if possible). :)

What role do traits play in affecting an organisms ability to reproduce? finches

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.

The fluid mosaic model of the membrane proposed that membranes