For this year's corn crop a farmer chooses to plant the seeds of the best-tasting corn plants from last year's crop. this is an example of
a. whole animal cloning
b. gene cloning
c. natural selection
d. artificial selection

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