Question

1. one of the bacteria in model 1 has a tail - like structure.

a. what is this structure called?
b. what might be the purpose of this structure?

Explanation:

a. Bacterial tail - like structures are flagella.
b. Flagella are mainly for locomotion, allowing bacteria to move towards nutrients or away from harmful substances.

Answer:

a. Flagellum
b. It is mainly used for locomotion, enabling bacteria to move in their environment.