During Chordate Evolution, What Is the Sequence (From Earliest to Most

question 18

Multiple Choice

During chordate evolution, what is the sequence (from earliest to most recent) in which the following structures arose?

• A) paired fins, jaws, swim bladder, amniotic egg, four-chambered heart
• B) jaws, paired fins, swim bladder, four-chambered heart, amniotic egg
• C) jaws, paired fins, paired fins, swim bladder, four-chambered heart
• D) paired fins, amniotic egg, four-chambered heart, jaws, swim bladder

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