Ion reacts with oxygen to form iron oxide (rust). witch best describes this statement

The diagram shows the structures of horse and cat forelimbs. what does the diagram suggest about the evolutionary relationship between these two mammals? a. they have homologous structures, indicating a common ancestor. b. they have analogous structures, indicating a common ancestor. c. they have homologous structures, indicating that they do not have a common ancestor. d. they have analogous structures, indicating that they do not have a common ancestor.

What happened to the amount of carbon dioxide in the atmosphere from 2010–2017?

The number of neutrons is equal to the atomic number minus the atomic mass. a. true b. false