Antibiotics work by affecting things that bacterial cells have but human cells don't. ... The antibiotic penicillin works by keeping a bacterium from building a cell wall. Bacteria and human cells also differ in the structure of their cell membranes and the machinery they use to build proteins or copy DNA.
Hello there.
Why did identifying rock layers because of their fossils become important?
It was the first indication that the layers were from different ages.
My best answer would be E<span>ukaryotic</span>
ans is D. Most items are features in the spinal cord, but the hippocampus is in the brain.