Stem cells are cells that can differentiate into many different kinds of cells. scientists have discovered that the environment supporting the cells influences stem-cell differentiation. for example, stem cells grown on strong, flexible surfaces became muscle cells. what most likely happened to stem cells grown on a hard, rigid surface?

Dna. we have heard that we are a product of our dna. but where is it? how do we "get" our dna? it is passed to us, from our parents, but in what form? several vocabulary words associated with inheritance are used interchangeably and sometimes, incorrectly. let's see if you can clear this up for someone just learning about inheritance and cell structure.