Is a girl doing any work while she stands still and holds a box? why or why not?

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.

Idon’t know how to solve this question

Fill in the coefficients that will balance the following reaction: a0cr2(so4)3 + a1agno3