I have my degree in Biology, work as an Engineer, and am getting my Masters in the Medical field.
Basically, do what you love, get a good degree that you can use for the field you are interested in, and the rest will follow.
Not only do you need a good degree so that people will give you opportunities, you need to have valid experience to show that you are capable.
If you want to be a field biologist, get a Biology degree and intern with a field biologist when you have time.
If you want to go into medicine, get a Biology/pre-med degree and volunteer with a local hospital.
If you want to go into herpetology, get a Biology or animal science degree and volunteer at a zoo/research facility.
It is all possible, as long as you know what your goals are.
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