if you are American, you obviously need a passport to travel to any country that is not an American state OR territory. so that would be a yes because the Dominican Republic is its own nation.
A Ugandan does not need a passport to enter the Dominican Republic.
Yes. To enter the Dominican Republic you will need your passport. period.
Yes, you need a biometric passport for entering to Dominican Republic.
Yes you do
Yes.
You need a passport to travel there from the US.
No if she has a passport she could travel anywhere without a USA passport
No you don't even need a passport to travel to the DR
No, you need a valid passport to enter to Dominican Republic, And depending of your nationallity you may need a visa before entering.
Yes you do. Since 2009. Check Dominican website to be sure.
A passport, immunizations - check with your travel agent they will have a list of what you need to do to prepare.
It is generally a good idea to have a passport when traveling. US citizens may enter the Dominican Republic without passports using other forms of ID and this is also true for children.