1.The oldest rocks are exposed in the center
If you're asking this question in terms of Literature, the film that is most famous for its use of synchronized sound is the jazz singer the jazz singer triggered the talking-picture revolution A year after the release of few different films, Hollywood recognized the importance of the jazz singer with regard to the motion picture history by honoring the film with an special award. :) Hope I helped!
Natural Selection could produce new variations of body parts.
Answer:
Apitite
Explanation: Apitite has a hardness of 5 it can scratch flouride but Quartz has a hardness of 7 meaning it can scratch Apitite
