Which statement best describes long-term environmental changes? They occur suddenly. They do not typically cause changes to DNA. They cannot occur gradually. They can occur anywhere from thousands to billions of years.

They can occur anywhere from thousands to billions of years.

DNA

Explanation:

Mutations are changes to an organisms DNA that creates diversity within a population by introducing new alleles. Some mutations are harmful and are quickly eliminated from the population by natural selection harmful mutations prevent organisms from reaching sexual maturity and reproducing.