BOTANY

Detailed explanation-1: -The earliest vertebrates were the hagfish and other fishes which lived in water. With evolution, the Amphibians evolved from the jawless fishes and could survive on land (as they had lungs). Therefore, amphibians are considered the first terrestrial vertebrates.

Detailed explanation-2: -Amphibians evolved about 365 million years ago from a lobe-finned fish ancestor. As the earliest land vertebrates, amphibians were highly successful for more than 10 0 million years until reptiles took over as the dominant land vertebrates. Amphibians are found throughout the world except in Antar ctica and Greenland.

Detailed explanation-3: -The first amphibians evolved from a lobe-finned fish ancestor about 365 million years ago. They were the first vertebrates to live on land, but they had to return to wate r to re produce .

Detailed explanation-4: -The earliest well-known amphibian, Ichthyostega, was found in Late Devonian deposits in Greenland, dating back about 363 million years. The earliest amphibian discovered to date is Elginerpeton, found in Late Devonian rocks of Scotland dating to approximately 368 million years ago.

Detailed explanation-5: -First vertebrates The earliest known vertebrates belongs to the Chengjiang biota and lived about 518 million years ago. These include Haikouichthys, Myllokunmingia, Zhongjianichthys, and probably Haikouella.