Question:
Tornaria larva is found in
Tornaria larva is found in
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Tornaria larva = Hemichordata (Balanoglossus).
Updated On: Jul 18, 2026
- Neries
- Balanoglossus
- Aphrodite
- Echinus
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The Correct Option is B
Solution and Explanation
Step 1: Understanding Hemichordata.
Balanoglossus belongs to the phylum Hemichordata. It shows characteristics of both invertebrates and chordates. It has a unique larval stage known as tornaria larva.
Step 2: Characteristics of tornaria larva.
Tornaria larva is free-swimming and resembles echinoderm larvae. It has ciliated bands that help in locomotion and feeding.
Step 3: Developmental significance.
This larva indicates evolutionary link between echinoderms and chordates. It supports the concept of phylogenetic relationship among deuterostomes.
Step 4: Evaluation of other options.
Nereis is an annelid, Aphrodite is a polychaete, and Echinus is an echinoderm. None of these show tornaria larva.
Step 5: Biological importance.
Tornaria larva helps in dispersal and survival of the species in aquatic environments.
Step 6: Final conclusion.
Thus, tornaria larva is found in Balanoglossus.
Balanoglossus belongs to the phylum Hemichordata. It shows characteristics of both invertebrates and chordates. It has a unique larval stage known as tornaria larva.
Step 2: Characteristics of tornaria larva.
Tornaria larva is free-swimming and resembles echinoderm larvae. It has ciliated bands that help in locomotion and feeding.
Step 3: Developmental significance.
This larva indicates evolutionary link between echinoderms and chordates. It supports the concept of phylogenetic relationship among deuterostomes.
Step 4: Evaluation of other options.
Nereis is an annelid, Aphrodite is a polychaete, and Echinus is an echinoderm. None of these show tornaria larva.
Step 5: Biological importance.
Tornaria larva helps in dispersal and survival of the species in aquatic environments.
Step 6: Final conclusion.
Thus, tornaria larva is found in Balanoglossus.
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