Which structure is responsible for cell movement in some single-celled organisms?

1. Single-celled organisms move using cilia or flagella. 2. Flagella are long whip-like projections (e.g. in Euglena). 3. Cilia are short hair-like structures (e.g. in Paramecium). 4. Both are made of microtubules. 5. So cell movement uses cilia or flagella. _Source: Selina Concise Biology ICSE Class 10, Ch 1 'Cell, the Structural and Functional Unit of Life'_