Question

does the white blood cell have more than one nucleus or only one large nucleus?

Answer 1

It appears to only have one, though its shape depends on the type of white blood cell, have a look at the table on here: http://en.wikipedia.org/wiki/White_blood_cell#Overview_table

Answer 2

white blood cells is a whole "family" of cells.
i believe that u refer to neutrophils - whic are a major componenet of the innate immune system. they are sometimes called PMN - poly-morpho-nuclear - as they have one contiguous highly lobulated nucelus. in a cross section u may see 5 segments 0 which appear to be unconnected but actually are all part of a polymorphonoclear. actually the number of segments attest to the cell maturity, not enough segments - too young a cell