How does extinction of a species cause more species to develop

Anton created a chart listing different types of materials. which best complete the chart?

What is the next step in the process after a substrate enters the active site of an enzyme

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.