Question

Choose the correct answers from the alternatives given.
The first vertebrates were:

• A. bony fish
• B. jawed fish
• C. jawless fish
• D. both (a) and (b)

Answer 1

The correct option is C jawless fish

During the late Cambrian, eel-like jawless fish called the conodonts, and small mostly armored fish known as ostracoderms first appeared. This was the earliest period of development of vertebrates.

So, the correct option is, 'jawless fish'.