Which of the following characteristics is not shared by birds and mammals?

Coelom is absent in

Which of the following is $NOT$ an endoparasite?

In which one of the following, the genus name, its two characters and its phylum are not correctly matched, whereas the remaining three are correct?

Select the animals having an open type of circulatory system:
$(i)$ $Ascidia$
$(ii)$ $Cockroach$
$(iii)$ $Earthworm$
$(iv)$ $Prawn$
$(v)$ $Silver$ $fish$
$(vi)$ $Snail$
$(vii)$ $Squid$

Column $-I$ represents the animal class, while Column $-II$ represents the exoskeleton. Choose the correct option:

Column $-I$	Column $-II$
$(A)$ Cartilaginous fishes	$(i)$ Cycloid scales
$(B)$ Bony fishes	$(ii)$ Epidermal scales
$(C)$ Reptiles	$(iii)$ Placoid scales