Question

What are the long, thin, hair-like appendages found in many types of bacteria called?

Answer 1

Cilia or flagella.

Explanation:

Cilia (plural) and flagella (plural) are projections from a cell often unicellular organisms. They are made of microtubules and often aid with movement of the cell. The cilia are shorter projections often more numerous and covering more of the cell. Flagella are more whip-like projections that act like a tail to help move the cell.