'Baptised' in the Bible

Is the Christ divided? has Paul been crucified for you? or have ye been baptised unto the name of Paul?

I thank God that I have baptised none of you, unless Crispus and Gaius,

that no one may say that I have baptised unto my own name.

Yes, I baptised also the house of Stephanas; for the rest I know not if I have baptised any other.

and all were baptised unto Moses in the cloud and in the sea;

For also in the power of one Spirit we have all been baptised into one body, whether Jews or Greeks, whether bondmen or free, and have all been given to drink of one Spirit.

Since what shall the baptised for the dead do if those that are dead rise not at all? why also are they baptised for them?