Stage in cellular reproduction when the chromosome line up midway between the centrioles with their centromeres attach to a spindle fiber

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

Scientific evidence is most likely to be consistent if it is based on data from

Steven hawking is on record as saying that viruses can be considered a form of life. considering the list above, what might be his evidence? a) item 5 b) items 1 - 3 c) items 4 - 7 d) items 1 & 2