Question

The phylum/phyla showing radial symmetry

• A. Porifera
• B. Coelenterata
• C. Echinodermata and Coelenterata
• D. Coelenterata and Platyhelminthes

Answer 1

The correct option is C Echinodermata and Coelenterata

Option 'C' is correct.

Symmetry is an attribute of an organism showing the regularity in body parts on a plane or around its axis. In Radial symmetry the body of an organism could be divided into two equal halves by cutting through any place passing through the central axis. Animals belonging to phylum Echinodermata can be equally divided by cutting through specific radii. Similarly, animals of phylum coelentrata can be divided into two equal halves.