Why should plastic bags be avoided for collecting and storing biological samples containing DNA? A. They leach chemicals.
B. They are difficult to store.
C. They are expensive.
D. They retain moisture.

Is citizens were comfortable with their detachment from england and had no interest in going to war

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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.