Carrie would like to observe the cilia on the surface of a live paramecium-a single-celled organism. the best device to do this would be a

The answer to this question would be: electron microscope

Cilia is a part of the paramecium membrane that looks like hairy projection. The size of cilia is too small to be examined closely using the light microscope. In this case, the electron microscope can provide a bigger magnification.