Student or Learner
It seems to me that we should an indefinite article there.
Interestingly, these ancient elements are often found in similar locations in the mouse and
human genomes (as in this example, where an ARE is present between
gene A and gene B in both human and mouse). Particularly interesting
are examples where the ARE was truncated at a precise base pair at the
time of insertion, losing part of its DNA sequence and all possibility of fu-
ture function (as in the example between gene B and gene C). Finding a
precisely truncated ARE in the same place in both human and mouse
genomes is compelling evidence that this insertion event must have oc-
curred in an ancestor that was common to both the human and the
Some people are starting to use it in the plural, but for most people is uncountable.
Just to add about google's search results, there are 305,000,000 hits for "waters".