Animals exhibiting radial symmetry are found in:

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.

Choose the incorrect statement.

Which of the following is a correctly matched pair?

In the given examples,how many animals are viviparous? Corvus,Columba,Macropus,Pteropus,Calotes,Hemidactylus,Psittacula,Struthio and Macaca.

In which of the following is ecdysis (moulting) $NOT$ observed?