Ok, well, I'm not employed in any science field and I don't have a degree in any science. (or at all, currently.) But my wife is a biology graduate student.
As far as careers go, she's looking at teaching high school science, doing teaching and/or research at a college/university, or working in the private sector. Her focus is entomology, so as far as the private sector goes, she's pretty much looking at agribusiness/pest control.
But there's always a need for skilled teachers, especially in the sciences. With a degree in biology and a teaching certification you can probably be employed in any school you like.
Oh, but here's one thing no one's mentioned yet - keep your writing/communication skills in top shape. Carl Sagan and Stephen Jay Gould may not have been the most brilliant scientists in their fields, but what they were unsurpassed at was comminicating the findings of science in a clear - and yet still correct - manner.
Publishing isn't just what scientists do for fame and money; it's possibly the most important part of the scientific method. What good is it to discover something but never tell anyone? It's sad that, while publishing is so important to scientists, few science programs seem to really emphasize the craft of writing. I've read a number of papers by science undergraduates and while the reasoning is sound and often brilliant, the writing is simply infantile. Clear writing is crucial in the sciences.
This message has been edited by crashfrog, 07-18-2004 11:17 PM