<p>Generally, with a bachelor’s in biology or chemistry, you can be a lab tech, but to advance much further you will likely need a higher degree. Engineers can generally get jobs in industry with only a bachelor’s (at least from my experience).</p>
<p>If you’re interested in research, I strongly advise you get involved with a research project, work in a lab, or try out different fields/labs in college as early as possible. Research isn’t all “groundbreaking” or “mixing stuff in vials,” and it takes a certain type of personality and though process (that is often very different than school work). There are also a lot of different fields within biology or chemistry with different types of research, and you might like one particular field better than another. Spend some time figuring out if lab work or research is something you’re interested in before you worry too much about what you want to major in.</p>
<p>That being said, if the question is biology/chemistry/astronomy vs. chemical engineering (or something of the sort), it’s probably much more easier in college to switch from chemical engineering to biology/chemistry in terms of what classes you need to take. There might even be overlap in some of the beginning courses, so that you can spend a little bit figuring out what you would really be interested in.</p>