Exercise 1. State the structure of bacterial cell envelope 2. State the special structure of bacterial cel 3. State the process of gram stain and the reason of different resul lIt 4. Which characters of bacterial cell can they be used to identify prokaryotic species? 5. Which differences are there between bacteria and archaeaExercise： ◼ 1.State the structure of bacterial cell envelope. ◼ 2. State the special structure of bacterial cell . ◼ 3. State the process of Gram stain and the reason of different result. ◼ 4.Which characters of bacterial cell can they be used to identify prokaryotic species? ◼ 5.Which differences are there between bacteria and archaea ?