<p>Is it hard to change your major?</p>
<p>No it is quite easy to change your major and most students do at least once.</p>
<p>Even if it's an impacted major (like Biology)?</p>
<p>Most impacted or difficult majors you declare as a pre-major. You then need to earn/maintain a certain GPA to be admitted. This is true at most UC's.</p>
<p>Not an overall GPA, but rather a GPA within certain pre-requisite courses.</p>