Question

Of the periods listed, which one is the earliest period when Ostracoderms, the jawless and finless fishes, appeared?

• A. Devonian period
• B. Cambrian period
• C. Carboniferous period
• D. Silurian period

Answer 1

Answer: (D)

Silurian period

Silurian Period occurred from 443 million to 416 million years ago. It was the third period in the Paleozoic Era. It followed the Ordovician Period and preceded the Devonian Period. It is called as Ages of fishes. Ostracoderms are the jawless and finless fishes. They belonged to Silurian period of Paleozoic era.

Thus, the correct answer is option D.