If Jack isn’t loyal at the last mission can I still get everyone out alive?? (Mass Effect 2)?

Matt asked:

Vent – Legion
Fire team lead 1 – Miranda
Fire team lead 2 – Miranda
escort – jacob

final mission:
mordin
jack

THAT is the combination i used for the last mission…however, jack died at the end when she was with me, is that because she wasn’t 100% loyal??

If so….could i just leave her with the team defending the door and bring someone else instead of jack in order to keep her alive…..OR will she die with them as well??

Thanks