What are three ways that antibodies fight infections

What noticeable trend from this graph might be used to make a conclusion?

What are some natural processes that represent physical and chemical changes?

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.