Cocci.....round
bacillus rod shaped
spirilla ..... spiral shaped . These are all different shapes of bacterial cell.
By using exponents, we can reformat numbers. This can be helpful, in much the same way that it's helpful (that is, it's easier) to write "twelve trillion" rather than 12,000,000,000,000., or "thirty nanometers" rather than "0.00000003<span> meters</span>
