Question

which structure in bacteria cells provide protection f human immune system? the ribosomes the cell wall the flagella

Explanation:

To solve this, we analyze each option:

• Ribosomes are for protein synthesis, not for protection against the immune system.
• The cell wall of bacteria (like peptidoglycan - based walls) can have structures (e.g., capsules or modified cell wall components) that help bacteria evade or resist the human immune system, providing a protective barrier.
• Flagella are for motility, not for immune - system - related protection.

Answer:

the cell wall