I know precisely what an ad hominem is and I called it accurately.
do you have trouble understanding why a biology professor might find your dismissive opinions of his entire profession irksome enough to respond to in kind?
Well, in kind would mean to demonstrate that mathematics was low-order thinking.
Where's your formal proof that biology is a "lower order" of thinking than mathematics?
Really? To what argument, precisely, was his Ad hominem response aimed, in place of a responsive argument?