Perspex and polythene are two examples of what?​

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 energy is it when you flip on a switch on a lamp

Elements in group 2 are all called alkaline earth metals. what is most similar about the alkaline earth metals?