answersLogoWhite

0

The most ancient group of vertebrates is generally considered to be jawless fish, particularly those in the class Agnatha, which includes lampreys and hagfish. These creatures first appeared over 500 million years ago and are characterized by their lack of jaws and paired fins. Their evolutionary significance lies in their primitive features, which provide insight into the early development of vertebrates.

User Avatar

AnswerBot

1mo ago

What else can I help you with?