|
There
are in water many organisms that are extremely
beneficial to man. Bacteria, protozoa and fungi that
purify polluted water are essential to our well-being.
Many of these organisms set into motion the chain
reactions that result in purifications.
We
can classify living organisms in water in many ways and
into many groups.
Biologically,
there are two major classifications for our purposes. We
can classify water organisms either as members of the
plant or animal kingdoms.
|
