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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.

Compare and contrast your sells take in oxygen, water, and food. what is one waste product that leaves your cells?

Why does sexual reproduction result in more genetic variation in a species