Collect data: Select the EARTH tab. Fill in the information for the latitude 40° S, on June 21 and December 21. (To measure the Sun ray angle, select Show protractor. The angle will be between 0 and 90 degrees.)

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