Only subject I referred to in junior high was grammar.
Calculus & zoology I learned during first 2 years in science college, then my 3rd through 5th years were spent in engineering school. Yes, in India it was 5 years to acquire Bachelors degree in engineering. Then I was admitted in 4 different US universities, Illinois, Iowa, Michigan, Purdue to pursue my master’s in engineering. I chose Iowa because it was least expensive of the 4.
My point was that lacking the Oxford comma, your list read as ‘zoology and geography’ as being a single class of both of those.