Or maybe some other activity has a higher priority. Stic k to both sides of the agreement. Use your curiosity. The best learning is motivated by curiosity. Give yourself room to wonder and speculate, to ask your own questions and make your own guesses.
Every course provides new information for solving problems.
More broadly, each course builds general thinking skills that are useful in every field. These skills relate to memory management, valuation, pattern detection, reasoning, and much more. The study of biology is especially good for building memory-management skills. Biology is a complex web of knowledge, with thousands of connected ideas. The daily flood of information can bury what you learned a week before.