Biology is way too much memorization. Chemistry isn't much different, though it requires you to string concepts together to learn the material, and biology doesn't.

I would agree with Sapphire about not rushing on declaring a major since it could decide your career path, but don't push it off too long. If you take all the English/History/Foreign Language classes in the first two years, you won't be able to use them as filler in your junior and senior years when you're taking difficult courses that apply to your major. Also, if you decide on a major after 2 years, it increases the likelihood you will take longer than 4 years to complete a degree, since upper level classes have prerequisites that could take a few semesters to acquire.