Question

Which phrase describes the structure of cilia?

a) Long, whip-like projections
b) Short, hair-like projections
c) Circular, disk-shaped structures
d) Large, bulbous formations

Answer 1

Cilia are short, hair-like projections that cover the entire surface of a cell's plasma membrane. They are used to move entire cells or substances along the outer surface of the cell. In contrast, flagella are long, hair-like structures that are used to move an entire cell.

Step-by-step explanation:

Flagella are long, hair-like structures that extend from the plasma membrane and are used to move an entire cell. Cilia, on the other hand, are short, hair-like projections that are used to move entire cells or substances along the outer surface of the cell. Unlike flagella, cilia are many in number and cover the entire surface of the cell's plasma membrane.