[单选题]
The electron micrograph below shows a cell 8 vx8tx,m h*dhof the bacterium Vibrio jwf/ lcq -d8k.2d; edn7 jym9mfmxd. 3cholerae. Which of the labelled structures maintains th 2mckw x fdjdql-/7 9. fj;dmdmn8.ye3e cell’s shape and protects the cell from lysing during osmosis?