The larval form of Hemichordata is called as:

Trochophore

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Tornaria

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Tadpole

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Ammocete

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Solution

The correct option is D Tornaria
A tornaria is the planktonic larva of some species of Hemichordata. Trochophore is the larva of marine annelids and most groups of molluscs.
A tadpole is a larval stage in the life cycle of an amphibian. Ammocoete is the larval stage of lamprey.
So, the correct answer is option B.

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The connecting link between invertebrates and chordates is the _____________ that belongs to the phylum _______________ and has a larval form called __________ which resembles the larval form of Echinodermata.

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