I'm faced with whether or not I should take the aforementioned courses in high school, rather than Small Animal Science and Large Animal Science. Are they important in vertebrae paleontology? I suppose that some things are related to it, but what about overall? Thanks.

to be honest I don't think it matters that much. as we have previously said the actual degree you do within the broad biology field will matter far less than the MSc or PhD you do as a post-grad. As always do the courses you enjoy and find stimulating and challenging.