Related articles:
Animalia
Annelid
Blastula
Bryozoa
Caenorhabditis elegans
Cambrian explosion
Cell wall
Chordate
Cnidaria
Drosophila melanogaster
Dye
Echinoderm
Embryo
Endoderm
Eumetazoa
Fauna
Flagellate
Germ layer
Heterotroph
Leech
Mesoderm
Mollusca
Ovum
Precambrian
Protist
Protozoa
Sea anemone
Sea urchin
Sponge
Vertebrate
Key terms:
all animals
animal phyla
animal phylum
animalia
animals
annelida
bilateria
blastula
body cavity
cambrian
carolus linnaeus
chordata
coelom
ctenophora
deuterostomes
dier
digestive
digestive chamber
ecdysozoa
endoderm
eukaryotic
fossil
fossil record
fungi
germ layers
heterotroph
lophotrochozoa
microscopic
million years ago
mollusca
most animals
motile
multicellular
originally considered
parasitic
photosynthesis
phyla
porifera
prey
protist
radially symmetric
sponges
sugars
sunlight
superphylum
tissues
trace fossils
undergo
unranked
worms
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