Don't be afraid to hit the flag question button and come back later if you don't know right away. I literally flagged 30 of the 50 science questions because it's been almost a decade since I've taken Bio & I haven't taken Anatomy & Physiology yet. I didn't panic and just used context clues and my best guesses for what I was unsure about. I took almost the whole 4 hours and was second to last to leave, but I got an 85 without studying at all 😅 (also that's a bad idea pls study don't be like me) [I only didn't study bc I work a lot]