Why might a scientist repeat an experiment if she/he didn't make a mistake in the first one? experiment are repeated to A) make sure she/he gets identical results.
B) see if any portion can be skipped or ignored.
C) prove that your results were incorrect the first time.
D) check to see if the procedure was correct and nothing was left out.

You are given an electron micrograph of a bacterial cell. in the micrograph you can clearly see three thin layers of different densities surrounding the cell. based on the micrograph, you can infer that this cell is and would appear after application of the gram stain procedure. gram-negative / pink gram-positive / purple gram-positive / pink gram-negative / purple