Question

Organisms attached to substratum generally possess:

• A. Bilateral symmetry
• B. Radial symmetry
• C. Biradial symmetry
• D. Both A and C

Answer 1

The correct option is B Radial symmetry

• Animals having radial symmetry are mostly aquatic.
• These animals can be sedentary animals or slow-moving animals.
• These depend on water currents for their food requirement.
• Radial symmetry allows the animal to detect food or danger approaching from any side.
• We can find radial symmetry in members of phylum Cnidaria and Echinodermata.

So, the correct answer is option B.