What scientists do that is the basis for there investigation

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 is the molar mass of potassium nitrate, kno3

As changes in energy levels of electrons increase, the frequencies of atomic line spectra they emit