How does mutation change allele frequency A. It forces evolution to happen by introducing new adaptions.

B. It causes some individuals to go extinct because their mutations hurt their chance of survival.

C. It adds new genes into the gene pool that didn't exist there before.

Explanation:

Mutations add new alleles into a gene pool. This causes a change in the frequency of certain allele combinations in the population, which will cause the population to evolve over time. They are a major evolutionary force that creates new gene variations.

the most common type of reef is the fringing reef. this type of reef grows seaward directly from the shore. they form borders along the shoreline and surrounding islands.

layer 3 is younger than layer 6.