Porifera

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Across
  1. 3. example of a porifera
  2. 4. process by which sponges filter out bacteria
  3. 6. Means "bearing pores"
  4. 7. the shape of sponges are characterized as ____
Down
  1. 1. large central cavity
  2. 2. found all over the body of sponges
  3. 5. usual shape of sponges