Living organisms are subdivided into 5
major kingdoms, including the Monera, the Protista (Protoctista), the Fungi,
the Plantae, and the Animalia. Each kingdom is further subdivided into separate
phyla or divisions. Generally "animals" are subdivided into phyla,
while "plants" are subdivided into divisions. These subdivisions are
analogous to subdirectories or folders on your hard drive. The basic
characteristics of each kingdom and approximate number of species are
summarized in the following table:
*Prokaryotic Cells Without Nuclei And
Monera [10,000 species]: Unicellular and colonial-including the true
bacteria (eubacteria) and cyanobacteria (blue-green algae). __________________________________________________
*Eukaryotic Cells With Nuclei And Membrane-Bound
Protista (Protoctista) [250,000 species]: Unicellular protozoans and
unicellular & multicellular (macroscopic) algae with 9 + 2 cilia and
flagella (called undulipodia).
Fungi [100,000 species]: Haploid and dikaryotic (binucleate) cells,
multicellular, generally heterotrophic, without cilia and eukaryotic (9 + 2)
Plantae [250,000 species]: Haplo-diploid life cycles, mostly
autotrophic, retaining embryo within female sex organ on parent plant.
Animalia [1,000,000 species]: Multicellular animals, without cell
walls and without photosynthetic pigments, forming diploid blastula.