$P$ - Assertion: Circulatory system is present in Annelids.
$Q$ - Reason: Circulatory system is absent in Aschelminthes.

Match the animal name in Column-$I$,its characteristic in Column-$II$,and its Phylum/Class in Column-$III$ correctly.
Column-$I$ (Animal) | Column-$II$ (Characteristic) | Column-$III$ (Phylum/Class)
$A$. Adamsia | $i$. Radial symmetry | $x$. Porifera
$B$. Petromyzon | $ii$. Ectoparasite | $y$. Cyclostomata
$C$. Ichthyophis | $iii$. Terrestrial | $z$. Reptilia
$D$. Limulus | $iv$. Body covered by chitinous exoskeleton | $w$. Pisces

Flatworms and roundworms are respectively called ........

Which one of the following animals is correctly matched with its one characteristic and the taxon?
Animal - Characteristic - Taxon

Comb jellies are ..................... and jelly fishes are .................. respectively.

Which organisms are included as members of the multicellular consumer kingdom?