How are 3-d printers useful in studying evolution ?

Secondary pollutants are more harmful than primary pollutants. select the best answer from the choices provided ot of

Where can you find prokaryotic and eukaryotic cells?

The chromosomal structure that limits the number of cell divisions of a cell is the the chromosomal structure that limits the number of cell divisions of a cell is the kinetochore telomere histones centromere