Biology
NULL
Medium
Question
They are considered to be the most primitive and are surely the first of the vertebrates?
A
Frogs
B
Reptiles
C
Amphibians
D
Jawless fishes
✓ Official correct answer
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A
Frogs
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B
Reptiles
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C
Amphibians
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D
Jawless fishes
No member explanations yet for this option.
Explanation
Jawless fishes (Agnatha), such as lampreys and hagfish, are considered the most primitive and are believed to represent the earliest lineage of vertebrates to have evolved.