How can cyclobutane (60°), cyclopentane (108°), and cyclohexane (120°) all be sp3 hybridized

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 methods could you use to solubilize calcium carbonate

What the blanks in these lines are ?