Question Detail
Question
Origin of jawed fishes was during what era? a. Cenozoic b. Paleozoic c. Mesozoic d. Precambrian
Correct Answer
Option B is the correct answer.
Detailed Explanation
Jawed fishes (gnathostomes) originated and diversified during the Paleozoic Era, specifically in the Silurian and Devonian Periods. The Devonian is even known as the 'Age of Fishes'.
Hint
This era, long before the dinosaurs, was when vertebrates first developed jaws and colonized the seas.