Answer:
Cilia /flagella aids in movement.
Step-by-step explanation:
Cilia and flagella helps in cellular movement.Bacteria contain flagella which helps in the propelling of bacteria towards nutrients or away from the waste materials.On the other hand cilia are threadlike appendages that helps in the attachment of bacteria to solid surface.
In human body respiratory system contain cilia which help to move mucus ,dust,germs and polens out of the body.
The tail of human sperm contain flagella which helps in the in the swimming of sperm inside the ovary in search of an egg.