Mouse mutations can affect an animal's appetite and eating habits. The ob gene codes for a satiety factor (being fed to capacity), the hormone leptin. The db gene product, the leptin receptor, is required to respond to the satiety factor. Leptin is a product of adipose cells. Therefore, a mouse that became very obese by eating in excess would be expected to have

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