Describe possible methods of transmission of oral bacteria

The activity of the modern sample is 1.10 bq . how long does that measurement take?

What molecules does hemoglobin decay into over time

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.