A U.S. citizen can vote in federal elections, run for federal office, and obtain a U.S. passport without restrictions. In contrast, permanent residents (green card holders) are not allowed to vote and may face limitations on running for office. Additionally, citizens cannot be deported, while permanent residents can be removed under certain circumstances.
yes
no, only us citizen can help for permanent resident
No, if you are a permanent resident in the US, you are treated like an American citizen in terms of colleges and universities.
by legally marrying that us citizen or print a form from the internet requesting to be a permanent resident
Not necessarily: you can be a permanent resident of this country.
Yes you can.
3 years of being permenent resident then you can apply
Permanent resident can apply for US citizen after live in US for 5 years (continuously and not leave the US in the period of 5 years).
The person must be a lawful, permanent resident for five years
No, its no mandatory. but its just that if your a citizen, you can vote, easier to travel outside the US, and sponsor relatives to come to USA.
Yes, however you would have to wait until your spouse becomes a citizen in order to file for alien resident status.
No. Any non-citizen who intends to reside permanently in the US, whether or not married to a citizen, must obtain permanent resident status.