They are considered to be the most primitive and are surely the first of the vertebrates?
(A) Frogs
(B) Reptiles
(C) Amphibinas
(D) Jawless fishes
They are considered to be the most primitive and are surely the first of the vertebrates?
(A) Frogs
(B) Reptiles
(C) Amphibinas
(D) Jawless fishes
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