True... examples: the spine helps you stay up right which would help for structure and the skull help protect the brain which would be protection
Answer:
C) Genes are in the order: a-b-c.
Answer:
The cilia is one of the things that act defensively in the respiratory system.
Explanation:
It propels a mucus-like liquid that covers the airway which traps pathogens (potentially infectious microorganisms) and other particles, preventing them from reaching the lungs.
