Hii..

For Geology Msc eligibility criteria is -

Essential subjects at (10+2) level- Mathematics

Essential subjects in bachelor’s degree along with minimum duration - Geology for three years/six semesters and any two subjects among Mathematics, Physics, Chemistry and Biological Science.

Thus yes maths is compulsory for class 12th for getting admission in MSC zoology through IIT JAM exam.

Hope it helps.