3 examples of complex interactions and example all 3 & why is it important

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.

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above

People with one sickle cell allele are not likely to get malaria. what is this an example of?