Earthworms belong to phylum Annelida, they are tube structured organisms living in soil. They have segmented body.
Sponges belong to phylum Porifera, they are marine dwellers and they are sessile organisms found in beautiful colours in ocean floor.
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the planarian digestive system is incomplete (it doesn't end up in an anus) while the earthworm digestive system is complete (it runs from the mouth to the anus).
Earthworm has a long and straight single intentions
While planaria has diffused diverticular
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* Earthworms are red in color and commonly 8- 10 inches long and 1/4-inch in diameter. * Earthworm makes tunnels that are at least 39-inches deep. * Earthworm can breathe while under water. But can't stay immersed for a long period of time.
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