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The answers are :-

1) Porifera

2)Cordate

3)Arthropods

4)Platyhelminthes

5)Mollusca

6)Cnidaria

7)Nematode

8)Annelida

9)Echinodermata

Explanation:

The explanation is as follows,

1) Porifera lack tissues

2) cordates have hollow nerve cord at some point of time

3) Arthropods have chitinous exoskeleton

4) Platyhelminthes class has the species flatworms

5)Mollusca contain the species molluskum.

6)Cnidaria have 2 layer cells

7)Nematoda have species round worms

8)Annelida have species segmented worms

9)Echinodermata have species with radial symmetry