In which of the following organisms is metamerism (segmentation) observed?

Which of the following pairs is mismatched?

Identify the location and function of the following structures:
$(i)$ Comb plates
$(ii)$ Flame cells

Which of the following represents a correct match of a somatic feature and the animal possessing it?

Which of the following statements are true/false?
$(i)$ In $Torpedo$,the electric organs are capable of generating strong electric shock to paralyze the prey.
$(ii)$ Bony fishes use pectoral,pelvic,dorsal,anal,and caudal fins in swimming.
$(iii)$ Amphibian skin is moist and has thick scales.
$(iv)$ Birds are poikilothermic animals.
$(v)$ The most unique mammalian characteristic is the presence of milk-producing mammary glands by which the young ones are nourished.

Match the following columns:

Column-$I$	Column-$II$
$(1)$ Reptilia	$(A)$ Jellyfish
$(2)$ Porifera	$(B)$ Leech
$(3)$ Coelenterata	$(C)$ Hyalonema
$(4)$ Annelida	$(D)$ Crocodile