Meggggr

I received an email to check my portal. And the rejection was on my portal. Maybe check your portal in case they sent that email to another one they had on file; otherwise you could potentially be waitlisted. I would email the program though since I believe interviews have already started

I would dress in business attire: blazer + blouse/shirt and tie. Interviews are not very formal but it can't hurt to dress professionally.
How to stand out: show your personality and passion for science! Interviews can range from you talking about your work for 20 minutes straight to very casual conversations about science and doing research. Interviewers want to see that you will complete a PhD. That means showing that you love science, showing you are not blindly following the instructions of a superior, and frankly that you can handle the workload. If you haven't done an independent project, be prepared to justify how you will be able to work on your own/without guidance. You will probably also be asked if you could continue working on your current project for 1 more year, what you would do.
Also, there will be a portion where the interviewers tell you about their work. Look interested and ask questions. I read a couple papers of each of my interviewers before going in. I don't think it was necessary but did help me.
Finally, you will be asked pretty often what you want to do in grad school. It doesn't have to be specific, but dream big. It would help to know a couple of techniques you're interested in learning and the subfield you want to explore. Example: "I'm really interested in addiction and drug use and would love to learn some molecular techniques to study opioid receptors as well as do fMRI studies in patients..." etc. It doesn't have to be perfect.
Overall, schools are also adjusting to online interviews and recognize the challenge. They are also trying to convince you to go to their school, so they are also working very hard to show the culture and value of their program. If you have multiple interviews lined up, you should also be feeling out the school and seeing how well you connect with the program! I also get nervous about online meetings but it's a two way street - everyone is very understanding of that and some difficulties are expected. 
In short: 
-practice talking about your research clearly and concisely
-know who you're interviewing with
-say a bit about what you dream of doing in grad school
-relax, you'll do fine if you like science
-take note of how much you like the school
Hope that helps, feel free to reach out to me if you have any other questions.
 

Anyone who got UCSD biological sciences hear a confirmation after submitting interview preferences? 

I see 7 posts if you search San Diego ? seems to be comparable to # of posts last year ... 

Do you guys think UCSD is done sending their Neuro invites? 

Do you guys think UCSD is done sending their Neuro invites? 

Do you guys think UCSD is done sending their Neuro invites?