Is this even that important in college admissions?

Thanks everyone for the replies!
Another question I had while reading everyone’s response was: Do Hispanics count as a URM? I know African Americans and Native Americans do, but I haven’t heard of another other race being a minority.

@Studious99 I was going to apply as a Caucasion because I don’t look Hispanic, and my last name is not Hispanic (because my dad shortened it) so I didn’t want them to think I was lying.

@ucbalumnus What type of rules? Do they require DNA testing? How can you find whether or not they do require specific evidence of your race.

Also, slightly irrelevant question, but what percentage of a race do you have to be in order to legally be classified as that race? (For example, if you’re only 1% North African, would you even classify as being an African American). I know I have some North African (around 15%) in me, and I’m not going to apply as African to game the system. But, I was wondering if, outside of college admissions, I would be classified as African American.