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Chondrostei: Quiz


Question 1: There are 52 species divided among two orders, the Acipenseriformes (sturgeons and ________) and the Polypteriformes (reedfishes and bichirs).
PaddlefishPallid sturgeonLake sturgeonHuso

Question 2: [1] Additional shared features include spiracles and, in sturgeons, a heterocercal tail (the vertebrae extend into the larger lobe of the ________).
Fish anatomyGillFishPrehistoric fish


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