The __________are craniates that lack a vertebral column.
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Q84: The _are aquatic reptiles that lack a
Q85: Lancelets, tunicates, and craniates are all classified
Q86: The_ is the internal membrane of the
Q87: Birds are feathered reptiles.
Q88: Mammals have the most complex nervous system
Q90: Hagfishes and lampreys differ from other fishes
Q91: Adult tunicates have lost two embryonic features:
Q92: Endothermic animals have four-chambered hearts.
Q93: The placenta in mammals is responsible for
Q94: Mammals have a _heart.
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