The cells that line our respiratory tract, and one-celled paramecia both have these short hair-like projections.
A) flagella
B) microfilaments
C) centrioles
D) cilia
E) pili

Question

Quizplus · Accepted Answer

The cells that line our respiratory tract and paramecia both have cilia, which are short hair-like projections that help them move and/or move substances over their surfaces. Flagella are similar but longer projections and are typically used for propulsion. Microfilaments and centrioles are not involved in the structure or function of cilia. Pili are found on some bacterial cells and are involved in adhesion and exchange of genetic material, but are not relevant to this question.

The Cells That Line Our Respiratory Tract, and One-Celled Paramecia