Mention one example each for animals with a chitinous exoskeleton and those covered by a calcareous shell.

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

What is true about $Nereis$,scorpion,cockroach,and silver fish?

Which of the following sets of animals belongs to the same phylum?

Sponges and coelenterates resemble each other in being

Find the odd example.