What is one way that changes can occur in a DNA sequence?
as a result of an extensive DNA analysis
as a result of shared common ancestry
through mistakes during DNA copying
90%
through advancements in molecular biology

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.

Does any one know what blood tastes like

Which of the following requires the use of energy and the of transport proteins to move a molecule across a cell membrane?