how has christianity ,a faith based on the teachers of one text, the bible didided into so many denominations?

Answer 1

Different interpretations by human beings.

Research these people:

Martin Luther

John Calvin

Joseph Smith

Answer 2

People are human and don't have the same experiences and opinions. For instance, when Christianity spread to Constantinople, it encountered people with different cultures and traditions. Naturally, that part of Christianity changed in order to accommodate these people.

For more information and information about the Protestant Reformation, read these sites.

http://www.religioustolerance.org/chr_hise.htm

http://www.schoolshistory.org.uk/protestantreformation.htm