How can plate tectonics contribute to evolution? A.) separating plates can divide groups of a population
B.) radiation from plate tectonics can cause genetic change
C.) volcanic eruptions can cause species to become extinct
D.) The movement of plates forces some animals underground

The double bond between a carbon atom and two oxygen atoms (a molecule of carbon dioxide) has two characteristics. what are they? a.an ionic bond is formed between the oxygen and carbon atoms. b.four valence electrons are shared. c.two valence electrons are shared. d.valence electrons are shared between oxygen atoms.