Step 1: Identifying bacterial appendages.
Bacteria possess various appendages such as flagella (for movement), fimbriae (for attachment), and pili (for genetic exchange). However, bacteria do not have cilia, which are present in eukaryotic cells.
Step 2: Analyzing the options.
(A) flagella: Incorrect, flagella are present in many bacteria and are used for movement.
(B) fimbriae: Incorrect, fimbriae are hair-like appendages that bacteria use for attachment.
(C) cilia: Correct, cilia are not found in bacteria, they are found in eukaryotic cells.
(D) pili: Incorrect, pili are present in bacteria and play a role in DNA transfer during conjugation.
Step 3: Conclusion.
The correct answer is (C) cilia, as they are not found in bacteria.