Which one of the following groups of three animals is correctly matched with their one characteristic morphological feature?

Options

A. `{:("Animals","Morphological features"),("Scorpion, spider cockroach",-"Ventral solid central nervous system"):}`
B. `{:("Animals","Morphological features"),("Cockroach,locust,Taenia",-"Metameric segmentation "):}`
C. `{:("Animals","Morphological features"),("Liver fluke, sea anemone, sea cucumber",-"Bilateral symmetry "):}`
D. `{:("Animals","Morphological features"),("Centipede,prawn,sea urchin",-"Jointed appendages "):}`

Answer

A

Explanation

Scorpion, spider and cockroach are invertebrates and belong to the Phylum Arthropoda, therefore they have ventral solid central nervous system. In cockroach and locust, the body is segmented externally. In Taenia, the body is without true segments. Liver fluke has bilateral symmetry, sea anemone has radial symmetry and sea-cucumber has bilateral symmetry in larval form and radial symmetry in adult form. Centipede and prawn have jointed appendages.