B.Sc

Eligibility for PGP:
The candidate must hold a Bachelor's degree, with at least 50% marks or equivalent CGPA (in case of the candidate belonging to Scheduled Caste (SC)/Scheduled Tribe (ST)/Differently Abled (DA) or Persons with Disabilities (PWD) category, this is relaxed to 45%)
A candidate appearing for the final year Bachelor's degree/equivalent qualification examination and those who have completed the degree requirements and are awaiting results can also apply. Such a candidate must produce a certificate from the principal/head of the department/registrar/director of the institution/university certifying that the candidate is currently in the final year/is awaiting final results and has obtained at least 50% marks or equivalent (45% in case of the candidate belonging to SC/ST/PWD category) based on latest available grades/marks.

Zoology as a career offers a number of specializations because of which the students are presented with a plethora of career options once they choose to be associated with this field. This field is concerned with the preservation and management of animal kingdom and a career in it would mean that you are a part of that responsibility.
A zoologist might even get to travel because of the nature of his / her job. Channels like National Geographic, Animal Planet, Discovery Channel are in constant need of Zoologists for research and documentaries. Zoologists are also hired for zoos, wildlife services, botanical gardens, conservation organizations, national parks, nature reserves, universities, laboratories, aquariums, animal clinics, fisheries and aquaculture, museums, research, pharmaceutical Companies, veterinary hospitals, etc.
Not only this, few other people who are zoologists by nature; Animal Behaviorists, Animal Breeders, Animal Trainers, Animal Caretakers, Animal and Wildlife Educators, Animal rehabilitation, Conservationists, Documentary Maker, Forensic Experts, Lab Technicians, Researcher, Wildlife Biologists, Veterinarian, Zookeeper, Zoo Curator, and much more.

The pre-requisites are:
Standardised test scores from either the SAT or the ACT. The prep books available for these tests at the US-India Education Foundation (USIEF) seems good.
Most colleges in the US expect scores from at least two SAT subject tests. These are exams that test in-depth knowledge of specific subjects. You can pick from a list of subjects like physics, chemistry, math, English literature, world history and foreign languages.
In addition to this, some colleges require TOEFL to ensure that you possess sufficient English skill. However, a good SAT score will waive this requirement, so check the college's website. You are recommended to take Andhra Pradesh or Advanced Placement Exams. You can also send additional material such as an arts supplement, research done, a resume or an extra recommendation letter.

Being a commerce stream student, you are not eligible for both the B.Sc and BCA course.
~ Only 12th standard science stream students are eligible to apply for B.Sc course.
~ 12th standard with mathematics subject students are eligible to apply for BCA course.
Since, that you are not having mathematics subject in 12th standard. So, you are not eligible for both the BCA and B.Sc course.
Being a commerce stream student that you have a lot of career options. You can apply for the Bachelor's degree courses like:
-Bachelor of Commerce
-Bachelor of Arts
-Bachelor of Business Administration
-Bachelor of Bank Management
-Chartered Accountant of India
-Cost and Work Accountant