As others have said, you just need to check out the requirements in your state as all are different... In Missouri, for example, new legislation (which I personally don't agree with) allow anyone with a batchelor's degree to take the Praxis exam in any area they wish for teacher certification... regardless of what their degree is in... if they pass the test, they can get initial Missouri certification... not sure if Alabama has something similiar... also there are probably alternative certification programs available, where you could simply take some of the education method courses that you may have missed in studio art to get your certification.
Since the early 1980s, Alabama requires teachers in secondary education to have majors in any and all subects that they teach. Since you are presently a student enrolled at the University of Alabama at Huntsville, you should be able to obtain the necessary information from the education department. If you have difficulty, contact the Department of Education in Montgomery, Alabama. To have a major, the requirements are 33 hours. With the No Child Left Behind Law, the graduate must also have passed the Praxis III exam.
I finished my BA in English and decided that I wanted to teach. In Illinois one has two options: certification or a MAT (Master's in Teaching). Either way, your major and minor play into the credits you would need to fulfill the subject specific coursework. The certification program allows you to only gain certification and the MAT allows you to get certification and a Master's.
I am not sure if Alabama offers similar programs--I am sure you could talk to someone in the Education Department at the university you currently attend.
The 'No Child Left Behind' Act raised requirements on teacher quality--and one of those requirements was to have a certain number of college hours in your subject area. You used to could be able to get a teacher's certificate for pretty much any area as long as you could pass the certification test--that's no longer true now since NCLB.
If Art is your minor, you probably will not be that far off from having enough hours to qualify. I would definitely consult the state education site link provided by one of the other posts, and contact the education department at your university about getting your teacher's certification.
Every state has different rules. You really need to check out the Alabama Department of Education and find out what you have to have to teach art. You might want to start with this link:
Sometimes a minor is enough, sometimes you might need to add some additional courses. I teach English with an English minor, but I had to take some extra English courses after I already had my bachelors degree.
Your best advice would come from your university course counselor. He or she should be able to give you the information you need in order to pursue those degrees and be ready to work in your chosen field. My guess is that your state has certification requirements for course work in the field you would be teaching and for course work in the department of education where you would learn about the art of teaching.