Hello, thank you for taking the time to post your question!
There are lots of resources available if you find yourself struggling in your intro level college biology course. Typically your textbook or course portal will come with access to online resources like practice quizzes, animations, and videos. Your professor might also provide study guides, practice exams, or other materials that could help you prepare for tests. And then a tutor can be helpful, so that could mean someone on Wyzant or you could check to see if you have access to an on-campus tutoring center.
Hopefully that gets you moving in the right direction! Feel free to reach out with a message if you have any questions beyond that! :)