What are the names of the varibles that a scientist uses when performing a scientif investigation experiment)?

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 diagram shows the ionic compound of magnesium oxide

Calculate the number of molecules present in 0.750 mol of mgo.