the field of comparative genomics studies the relationship of genetic structures across different biological species comparative genetic analyses on several species of mammals have shown that significant genetic similarities can be found across physically diverse mammalian species this indicates that

What is the main difference between primary and secondary sources? a. primary sources are historical documents, and secondary sources are modern-day documents. b. primary sources are derived from museums and archives, and secondary sources are created by history students and academics. c. primary sources are found in ancient places with a rich history, and secondary sources are found in historical journals and blogs. d. primary sources are created during a particular historical era, and secondary sources are created by studying primary sources.