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Arthropods and sponges are two major divisions in taxonomy called Phyla (singular, phylum). Phylum Arthropoda ("joint appendages"), or the arthropods, includes such creatures as insects, Spiders, millipedes, crustaceans, etc. Phylum Porifera ("pore-bearing") are the sponges.

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βˆ™ 11y ago
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βˆ™ 11y ago

Arthropods have specialised body parts, whereas sponges are just colonies of cells. When you break down a sponge, every cell can still fend for itself - they're basically still amoebae. Arthropods are true multicellular animals.

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βˆ™ 11y ago

Sponges (porifera) differ significantly from arthropods in complexity, shape, behavior, reproduction, mobility, and other ways. Although they are animals, adult sponges are mostly sessile somewhat like plants stuck in one place (some can move at extremely low speeds); they have no true tissues or organs, and have no respiratory, circulatory, digestive, excretory, or nervous systems. They also lack the symmetry of arthropods, with a somewhat amorphous body pattern optimized for their feeding and oxygenation method, which involves a constant water flow. Sponges are also strictly aquatic, by contrast to a large and diverse number of land-based arthropods.

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βˆ™ 11y ago

Arthropods are animals with jointed legs and an exoskeleton, such as centi/millipedes, lobsters, crabs, spiders, scorpions, and insects. All these groups fall under the arthropods.

Larvae are the juvenile forms of arthropods - their babies, sometimes looking very different from the fully grown forms. Caterpillars are butterfly larvae. The larvae of lobsters and crabs often float along in plankton, too small to be seen with the naked eye!

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βˆ™ 11y ago

They don't. Sponges (porifera), mollusks, cnidarians, and arthropods are separate phyla.

"Worm" is a rather vague term that is typically used to describe three different phyla: Anellida (segmented worms), Nematoda (round worms), and Platyhelminthes (flatworms).

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βˆ™ 11y ago

No. Sea sponges belong to phylum Porifera ("pore-bearing"), whereas arthropods with their joint appendages, exoskeletons and segmented bodies, belong to phylum Athropoda.

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βˆ™ 11y ago

They're not. They're completely different phyla, which means arthropods and sponges are as closely related as vertebrates and sponges, or vertebrates and arthropods!

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Q: Is a sponge an arthropoda
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