I was offered an admission from BSc in atmospheric sciences to PhD in atmospheric sciences. However, since I was asked to do one year of graduate courses before actually doing the PhD I refused. Doing a MSc and getting the degree would take one more year so I decided it was safer and better for me to just do the MSc first. This was a safe decision since my advisor got a professor position at an other university and I have to do the switch. Since I just finished the MSc, I applied for the PhD there. It would have been really complicated to do the switch from PhD to PhD considering I did not have a MSc degree.....