[Campbell Biology P.805] Which statement accurately describes a key evolutionary characteris... | Practice Question

Which statement accurately describes a key evolutionary characteristic or transition among chordates and early vertebrates as presented or implied in the text?

  • A: Vertebrates and tunicates share the derived character of jaws adapted for feeding.
  • B: Both monotremes and marsupials lay eggs, distinguishing them from eutherian mammals.
  • C: A sturdy-finned, shallow-water lobe-fin fish with skeletal supports similar to terrestrial vertebrates is considered a likely ancestor of living tetrapods.
  • D: Early tetrapods possessed a highly integrated and efficient breathing and locomotion system, allowing for sustained running.

Explanation

Option C directly reflects the description of the likely ancestor of living tetrapods mentioned in question 6 of the 'Test Your Understanding' section, which refers to a sturdy-finned, shallow-water lobe-fin whose appendages had skeletal supports similar to those of terrestrial vertebrates. The other options contain inaccuracies as per the provided text.