What element is this? how do you know? (page 495 and periodic table pages 500-501)

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.

Frictional forces acting on an object are often converted into energy, which causes the temperature of the object to rise slightly.

When a septic tank backs up a goes in to clean it out