What is true when a reaction has reached equilibrium? A. The concentration of the reactants is changing.
B. The concentration of products and reactants is constant.
C. The reaction has stopped.
D. The concentration of the products is changing.

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.

Jessica is traveling from miami, florida, to chicago, illinois. using the map, tell one way the land will change during the second half of her trip.

Use the table to identify the phase and phase changes of the elements under the given conditions. write the name of the substance, phase, or phase change