Only the court can do that.
certainly
If he didn't sign his rights away then i believe he never lost any rights and can stop the adoption
Not without approval of the court.
Your mother getting married is not the same as adoption. Your status does not change unless there is a formal adoption process, which means your natural father has to agree as well.
The father can file for paternity rights.
No he wasn't, only his mom and children.
no
You can't. Your mom has to sign away their rights or have them taken away before you can get adopted.
If their is no one else in the family to take care of them meening the mom than yes but you have to go through cps child protective services to do so.
yes see links
Unless he has gone to court to get his parental rights, yes.
No, I've been through this. She is not the mother. you are! as long as you didnt sign over custody, you and your baby should be fine