while trying to use the biomaRt package I keep getting an error as displayed below.

> library("biomaRt")
Error: package or namespace load failed for ‘biomaRt’ in loadNamespace(j <- i[[1L]], c(lib.loc, .libPaths()), versionCheck = vI[[j]]):
 there is no package called ‘bit’
> listMarts()
Error in listMarts() : could not find function "listMarts"

Any time you get an error that says, for example

there is no package called ‘bit’

what it really means is 'in order to load biomaRt, you first need a package named bit, which has not been installed yet', and the obvious fix for that is to install bit.