$A$: All higher animals from $Annelida$ onwards possess an organized circulatory system.
$R$: Coelomate organization is observed from $Annelida$ onwards.

Differentiate between Chondrichthyes and Osteichthyes.

Consider the following three statements $(A-C)$ and select the option which includes all the correct ones only:
$(A)$ The earthworm shows metameric segmentation.
$(B)$ Platyhelminthes shows organ level of body organisation.
$(C)$ In Aschelminthes,mesogloea is present between ectoderm and endoderm.

Which of the following represents the correct combination without any exception?
Characteristics - Class

Match the following columns and select the correct option.

Column-$I$	Column-$II$
$(a)$ Gregarious,polyphagous pest	$(i)$ Asterias
$(b)$ Adult with radial symmetry and larva with bilateral symmetry	$(ii)$ Scorpion
$(c)$ Book lungs	$(iii)$ Ctenoplana
$(d)$ Bioluminescence	$(iv)$ Locusta

$(a)\quad(b)\quad(c)\quad(d)$

Among the following animals, which one produces the smallest egg?