I’m still confused. In your original post, you said “UAF is my top choice for grad studies in chemistry”, which seemed to indicate that you were interested in graduate studies in chemistry. Nevertheless, if you are interested in either chemistry and/or atmospheric science programs, both of those are far more heavily chemistry (and physics, in the latter case) than biology. So I’m still not sure why biology would be an ideal major choice for those career goals.
Of course, you are free not to answer if you don’t want to! And of course you can major in whatever you’re most interested in. I’m just curious about it 