Question

Select the taxon mentioned that represents both marine and freshwater species –

• A. Echinoderms
• B. Cephalochordate
• C. Ctenophora
• D. Cnidaria

Answer 1

The correct option is D Cnidaria

• Cnidarians are aquatic, mostly marine, sessile or free-swimming, radially symmetrical animals.
• Ctenophores, commonly known as sea walnuts or comb jellies are exclusively marine, radially symmetrical, diploblastic organisms with tissue level of organization.
• These animals have an endoskeleton of calcareous ossicle and, hence, the name Echinodermata (Spiny bodied). All are marine with organ-system level of organization.
• Cephalochordates are often referred to as protochordates and are exclusively marine.

So, the taxon mentioned that represents both marine and freshwater species – cnidaria.