What two things are compared when patterns of evolutionary relationships are constructed using molecular phylogenetics?

Me with these questions if you’re it sure don’t answer

When rutherford performed his metal foil experiment, he was surprised that most of the alpha particles

Which line in the graph above best illustrates an effect of the carbon dioxide level in the blood on breathing rate before, during and after a period of exercise? 1.b,2.c,3.a,4.d