An in vitro transcription system that contains a bacterial gene does not initiate transcription. What is one possible problem

Scientists discover two populations of mice on either side of a major river. the two populations have almost identical genes but the mice from one side cannot breed with mice from the other. this is most likely because

The color of the fur is the genotypephenotype.the genetic combination of alleles that determine the fur color is called the genotypephenotype.

What characteristic makes a cell membrane selectively permeable