Hi aspirant
There are various ways a biology student can join Indian Army and serve the nation with pride. The ways are :
The CDS exam (https://ssbcrackexams.com/course/cdse/) is conducted by UPSC for the aspirants who are in the final year of graduation or passed out of college. Through CDS exam, one can join, IMA, AFA, INA and OTA. Women can only join OTA Chennai through CDS Exam. CDS examination gives army aspirants to choose between permanent commission and short service commission.
Candidates who have qualified 10+2 CBSE/ICSE/State Board Examination with minimum aggregate of 70% marks in Physics, Chemistry and Mathematics are eligible to apply for commission under the 10+2(TES). On being successful in the SSB and being declared fit by the medical board, they undergo one year basic military training at the Training Academy and thereafter undergo three years engineering degree course in respective streams before getting Permanent Commission. On being commissioned, they are further put through one year of post commissioning training for the Arm/Service into which they are commissioned. This option is only applicable to you if you had mathematics with you biology subjects as well.
There are many more ways through which you can join Indian Army but since you are a biology student this answer has been kept limited given your available choices. However you can also become a doctor in Indian armed forces after you complete your MBBS.
I hope this answer helps you
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