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They have a lot of basic stuff in common, like being made up of cells, being able to eat, do respiration, etc. I think your worksheet is looking for the highest level of commonality, probably that they are both (surprise!) animals! (A sea sponge is not a plant. A kitchen sponge is not the same thing as a sea sponge.) A sponge is the simplest of animals, but it was motile (it could move) (*when it was a baby sponge) and it's a heterotroph

(it eats other living things).
*They also both live in the sea!

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11y ago
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12y ago

nematocysts

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Q: What do sponge jellyfish crab have common in?
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