<p>Today I probably aced the SAT 2 BIO; however, I left a thin short line next to the number of each question I wanted to double check, when I finished I forgot to erase it, I usually fill the bubbles really hard, I just want to know if the stray marks affect anything.</p>
<p>I think you should be fine, it shouldn’t affect the results at all, as long as it was light enough.</p>