Explore the fascinating world of invertebrates with questions on phyla, classes, and unique biological characteristics.
Cephalopoda
Holothuroidea
Asteroidea
Chelicerata
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Earthworm
Sea Star
Flat worm
Horseshoe Crab
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Mollusca
Ctenophora
Echinodermata
Chaetognatha
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Nematoda
Annelida
Platyhelminthes
Nemertea
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Comb Jelly
Sponge
Brittle Star
Coral polyp
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Notochord
Dorsal Hollow Nerve Cord
Calcified spinal cord
Muscular Postanal
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DNA
Relationships between groups of organisms
Interactions between organisms
Interactions between living and nonliving things
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Bryozoa
Arthropoda
Nematoda
Porifera
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Hermaphroditism
External fertilization
Broadcast spawning
Cross-pollination
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Barnacle
Ophiuroid
Amphipod
Shrimp
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Sponge
Lobster
Human
Flat worm
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Cl. Anthozoa
Cl. Hydrozoa
Cl. Bivalvia
Cl. Aves
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Gastro-
Arthro-
Seta-
Cephalo-
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Chordata
Arthropoda
Cnidaria
Annelida
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