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Find the aspect of biology that you like the most and apply for a masters or Ph.D program in that field. Other options consist of Professional schools such as Nursing, Pharmacy, Physical Therapy, Occupational therapy, Medicine, Dental.
Job options specifically in biology would be to teach (after getting an additional teaching certificate), research, and any non-specific job. Having an undergraduate degree shows that you are able to work hard and learn which is a very sought after trait in any job.