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Important characteristic that lancelets share with sharks is

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operculum in embryonic stage

dorsal myogenic heart in adults

persistent notochord in adults

paired fins in embryonic stage

answer is C.

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Detailed Solution

Important characteristic that lancelets (Cephalochordata) hare with sharks (Chondricthyes /cartilaginous fishes) is persistent notochord in adults.

Operculum is characteristic of bony fish.

Paired fins are found in members of Pisces.

Dorsal heart is characteristic of non-chordates (if heart is present).

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