What is the mrna strand that would be copied from this dna strand

Asquirrel population lives in an area. over many years, a river in that area grows wider and stronger, eventually forming a canyon. the squirrel populations on the two sides of the canyon can no longer mate with each other and ultimately form distinct species. this is an example of

What is the main fuel source for the work of the cell

During the process of blank and molecules such as a glucose must use a protein channel to cross through a cell membrane