What is true about Nereis, scorpion, cockroach and silver fish? (a) They all possess dorsal heart. (b) None of them is aquatic. (c) They all belong to the same phylum. (d) They all have jointed paired appendages.
Option A Nereis, scorpion, cockroach and silver fish are all invertebrates and thus possess dorsal heart. Nereis is a marine animal while other animals mentioned in the question are terrestrial. Nereis belongs to Phylum Annelida while rest of the animals belong to Phylum Arthropoda. Jointed appendages are present in scorpion, cockroach and silver fish.
