Will colleges know if I don't send all my scores?

<p>So when I retook my Bio SAT II, I retook Lit as well, hoping to boost the 750. But I ended up burning out and getting a 680.
Bio's all good now, but I'm definitely trying not to send that 680 in Lit.</p>

<p>My colleges want all my scores, but - ethics aside - is there any reason for me to send them?
Is there any way for them to see my other scores, or the fact that I've withheld one or more scores?</p>