<p>Take a look here: <a href="http://www.usc.edu/academics/classes/term_20063/classes/si.html%5B/url%5D">http://www.usc.edu/academics/classes/term_20063/classes/si.html</a></p>
<p>All of those Cat6 classes have 1 lecture, so in other words your professor is pretty much set and the time is set.</p>
<p>If you take a look at General Bio here (<a href="http://www.usc.edu/academics/classes/term_20063/classes/bisc.html)%5B/url%5D">http://www.usc.edu/academics/classes/term_20063/classes/bisc.html)</a>, you can see that you have a choice for lectures, which is pretty rare.</p>