Question

1. how are bacteria useful in various fields today? select all that apply. to study a wide range of illnesses to cause illnesses and infections in humans to clean up oil spills to develop new medicines to fight diseases

Explanation:

Bacteria are used in medical research to study illnesses, can be employed in bioremediation to clean up oil - spills, and are involved in the development of new medicines. Causing illnesses is a harmful aspect, not a useful one.

Answer:

to study a wide range of illnesses
to clean up oil spills
to develop new medicines to fight diseases