fill in the blanks with correct group of invertebrates weather coelenterate , echonoderm, poriferan, mollusk, anthropod, annelid, nematod or platyhelminthes.

4) ________ are animals with bodies full of pores.
5) ________ are segmented worms.
6) ________ are round worms.
7) ________ are flat worms.

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