From band of cilia identify this figure.

Tornaria larva

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Trochophore larva

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Planeria larva

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None of the above

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Solution

The correct option is B
Tornaria larva

A tornaria is a planktonic larva. These larvae are found in some species of Hemichordata. It is very similar in appearance to the bipinnaria larvae of starfishes. The body of the larvae is with convoluted bands of cilia running around the body. Tornaria larvae eventually metamorphose into young worms.
Thus, the correct answer is option A.

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