Question

1. what do all infectious diseases have in common? they are caused by pathogens. they are caused by genetic mutations. they are caused by the environment. they are caused by a combination of genetics and environment.

Explanation:

Infectious diseases are defined as diseases caused by pathogens (such as bacteria, viruses, fungi, or parasites). Genetic mutations cause genetic disorders, environmental factors cause non - infectious environmental diseases, and the combination of genetics and environment is more relevant to multifactorial non - infectious diseases.

Answer:

They are caused by pathogens.