Question

which feature is shared by plant and bacterial cell walls? they both allow cells to move. they both protect the cell and provide structure. they are both made of the same material.

Explanation:

1. Analyze the first option: Plant cells (with cell walls) are relatively stationary, and bacterial cell walls don't primarily function to enable movement. So this option is incorrect.
2. Analyze the second option: Plant cell walls (made of cellulose) and bacterial cell walls (e.g., peptidoglycan in many bacteria) both serve to protect the cell from external stress and provide structural support to maintain cell shape. This option matches their shared function.
3. Analyze the third option: Plant cell walls are mainly cellulose, while bacterial cell walls (e.g., Gram - positive have thick peptidoglycan, Gram - negative have thinner peptidoglycan and an outer membrane) are not made of the same material as plant cell walls. So this option is incorrect.

Answer:

The option "They both protect the cell and provide structure." (the second option among the given choices, assuming the options are presented in the order: "They both allow cells to move.", "They both protect the cell and provide structure.", "They are both made of the same material.").