Question

Choose the correct common characteristic between an annelid and a mollusc.

• A. Jointed legs
• B. Presence of parapodia
• C. Triploblastic body organization
• D. Presence of an outer shell

Answer 1

Answer: (C)

Triploblastic body organization

Annelids and molluscs are triploblastic, having three primary germ layers, endoderm, mesoderm, and ectoderm.

Arthropods are characterized by jointed legs. Parapodia, present in some annelids, help in swimming. The outer shell is present in some molluscs like Unio.

Therefore, the correct answer is option C.