Which is an example of scientists using biotechnology to benefit aquaculture? 1. producing a faster-growing salmon species.

2. making new forms of human antibiotics.

3. developing a rot-resistant gene for trees.

4. creating pest-resistant crops.

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