Question

Which one of the following is not a correct pair?

• A. Trochophore- Annelida
• B. Bipinnaria- Echinodermata
• C. Tornaria- Arthropoda
• D. Planula- Coelenterata

Answer 1

Answer: (C)

Tornaria- Arthropoda

Trochophore is a small, translucent, free-swimming larva, characteristic of marine annelids and most groups of molluscs. Bipinnaria is the first stage in the larval development of most starfish, belonging to the phylum Echinodermata. Tornaria is the planktonic larvae of some species of Hemichordata e.g., acorn worms not arthropods. A planula is the free swimming, flattened, ciliated, bilaterally symmetric larval form of various cnidarian/coelenterate species. Therefore, the correct answer is option C.