$A$ list of animals is given below. Identify the animals with an open circulatory system and choose the correct answer.
$(A)$ Ascidia $(B)$ Cockroach
$(C)$ Earthworm $(D)$ Prawn
$(E)$ Silverfish $(F)$ Snail
$(G)$ Squid

Mark the odd member from the following:

Distinguish the characteristics for Chondrichthyes (Cartilaginous fishes) and Osteichthyes (Bony fishes) from the following list:
$I$ - Air bladder absent,$II$ - Operculum absent,$III$ - Cycloid or ctenoid scales,$IV$ - Placoid scales,$V$ - Ventral mouth,$VI$ - Terminal mouth,$VII$ - Internal fertilization,$VIII$ - External fertilization.
Select the correct grouping for Chondrichthyes and Osteichthyes respectively.

Which group of animals belong to the same phylum?

The figures $(A-D)$ show four animals. Select the correct option with respect to a common characteristic of two of these animals.

What does the term 'Frugivorous' mean?