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The
Diversity of The World of Life
Eukaryotes
(Domain Eukaryota)
Animals
(Metazoa)
Biology
Representatives
Sponges
(Porifera)
Placozoans: The Simplest
Known Animals
(Placozoa)
Comb
Jellies (Ctenophora)
Hydras,
Jellyfish, Sea Anemones, Corals, etc. (Cnidaria)
Flatworms (Platyhelminthes)
Rotifers (Rotifera)
Gastrotrichs (Gastrotricha)
Moss Animals etc.
(Bryozoa)
Lamp Shells etc.
(Brachiopoda)
Ribbon Worms (Nemertea)
Mollusks: Clams, Slugs,
Squid, etc. (Mollusca)
Peanut Worms (Sipuncula)
Segmented Worms
(Annelida)
Spiny
Headed Worms etc. (Cephalorhyncha)
Roundworms
(Nematoda)
Velvet
Worms (Onychophora)
Waterbears
(Tardigrada)
Arthropods:
Trilobites, Arachnids, Crustaceans, Myriapods, Insects, etc.
(Arthropoda)
Echinoderms:
Sea Lilies, Sea Stars, Sea Cucumbers, Sea Urchins, etc.
(Echinodermata)
Acorn
Worms etc. (Hemichordata)
Chordates
(Chordata)
Tunicates,
or Sea Squirts (Urochordata)
Lancelets (Cephalochordata)
Craniates: Animals
with Skulls (Craniata)
Hagfish (Hyperotreti)
Vertebrates: Animals with Backbones (Vertebrata)
Biology
All animals are "heterotrophic"
(consuming other organisms or their products as food). Almost
all animals are mobile. The
cells of animals do not have cell walls.
Representatives
Eukaryotes
(Domain Eukaryota)
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