Members of Echinodermata, Hemichordata, and Chordata had which of the following larva as a common ancestral form?

Tornaria

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Trochophore

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Dipleurula

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Bipinnaria

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Solution

The correct option is C Dipleurula
Dipleurula is a hypothetical larva of the Echinoderms. It is a bilaterally symmetrical, ciliated larva.
Dipleurula larva has common traits with echinoderms, hemichordates, and chordates and is considered to be the common ancestor.

Therefore, the correct answer is option C.

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Water vascular system is the characteristic of which group of the following:

(a) Porifera

(b) Ctenophora

(d) Chordata

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