I'm sure that's 100% true.
The answer is true. Mutation is the result of the mismatch of a base pair during the duplication. Mutations are neither the results from errors during the replication of DNA or other types of damage to DNA. In simpler words, DNA errs to copy accurately.
The light of the moon is sunlight hitting its surface and reflecting it onto us. The phases of the moon are caused by its position in relation to the sun and earth. The light is reflected at different angles, so we see 'phases' of the moon.