In the illustration, the long, whiplike extensions on the bottom of the cell are called a) cilia. b) flagella. c) mitochondria. d) pili.

The correct answer is option B- Flagella  

Flagella are a microscopic, whip like structure attached to cells of protozoan, bacteria and help them swim.

There are 4 ways flagella can be attached to a cell.

- A single whip at one end of cell called Monotrichous

- A bunch of flagella at one end is called Lophotrichous  

- A Pattern in which Flagella cover the whole cell is called Peritrichous

- Bacterial cell without flagella is called Atrihous

lipid

explanation: