Ucan physically see the ? of a trait, but not the ?

U can physically c the Phenotype of a trait(looks), but not the Genotype(DNA). Ik this is right because I learned about this last yr.

unicellular organisms, like bacteria, are able to perform all life functions within one single cell. multicellular organisms need many different types of cells to carry out the same life processes. each of these special types of cells has a different structure that it perform a specific function.