Which statement is scientifically based? mutations rarely occur. all mutations are harmful. some mutations can be contagious, like infections. mutations are not passed from parent to offspring.

Option). Mutations rarely occur.

Explanation:

Mutations can be defined as permanent, heritable changes in the sequence of DNA that transfer from one generation to next generation. Mutations are caused by errors during replication due to exposure of mutagens (mutation causing agents).

Mutations occur rarely as there are several repair mechanisms that repair the errors occur during replication or due to mutagens that can lead to development of mutations.

Although mutations lead to various disorders, not all mutations are harmful as some mutations are neutral and some mutations also show beneficial traits.

Mutations are not contagious as it is a genetic change, means they cannot spread from person to person.

Thus, the correct answer is first option.

it would lead to upper respiratory infections and pneumonia.