Here’s the correct order of steps showing how antibiotic resistance can spread through a bacteria population: 1. The antibiotic-resistant Shigella connects to a second Shigella cell. 2. The antibiotic-resistant Shigella passes a chunk of genetic material to the second Shigella cell. 3. One Shigella cell's genetic material shifts, causing the cell to change shape. 4. The second Shigella cell changes shape, making it resistant to amoxicillin. 5. The second Shigella cell reproduces asexually. 6. Both daughter bacteria are resistant to amoxicillin.