For the 7th question- Option looked very correct to me. In fact disinterested seems such an unlikely answer for blank 1 as science exploration doesn’t seem disinteresting to scientists right!
For the first question:
I think you are conflating the terms “mechanism” and “vitalism” to have a similar meaning, whereas the author of the statement is trying to convey that the terms independently do not have a singular meaning (math strategy: opposite of various = singular, not identical). In the second case only univocal works. Also, suspect wouldn’t be my first choice since its primary use is as a noun. And since it is the opinion of the author, the statement can be strongly worded.
For the second question:
The word disinterested also means to have no personal biases at play, and the “though” at the beginning of the sentence indicates that there should be a contrast in ideas, so option D seems to fit best.
Hope this helped!
Thanks. Ya now it looks more clear
