<Tr> <Td> Social implications (show) <Ul> <Li> Evolution as fact and theory </Li> <Li> Social effects </Li> <Li> Creation--evolution controversy </Li> <Li> Objections to evolution </Li> <Li> Level of support </Li> </Ul> </Td> </Tr> <Ul> <Li> Evolution as fact and theory </Li> <Li> Social effects </Li> <Li> Creation--evolution controversy </Li> <Li> Objections to evolution </Li> <Li> Level of support </Li> </Ul> <Li> Evolution as fact and theory </Li> <Li> Creation--evolution controversy </Li>

What are two signs that different species may have a common ancestor