The first vertebrates evolved during the Cambrian Explosion about 525 million years ago. The Cambrian Explosion, obviously, occurred during the Cambrian period. The Cambrian period was part of the Paleozoic era.
No, the first vertebrates evolved long before the Mesozoic. The first vertebrates, small jawless fish, evolved around 520 million years ago. Land animals had even evolved long before the Mesozoic Era.
Vertebrates first appeared during the Paleozoic era.
No. The 1st vertebrates appeared in the fossil record about 525 million years ago during the Cambrian Period. This was in the Paleozoic Era.
The first vertebrates appeared during the Cambrian period, approximately 525 million years ago. These early vertebrates were jawless fish, known as agnathans, which marked a significant evolutionary development in the animal kingdom. Fossil evidence, such as the discovery of the extinct genus Myllokunmingia, supports this timeline and highlights the emergence of complex structures in early vertebrates.
The mammals.
MAMMALS
Multicellular organisms first appeared during the Vendian period.
Humans first appeared during the Quanternary Period which includes the Pleistocene and Holocene epochs.
Humans first appeared during the Quanternary Period which includes the Pleistocene and Holocene epochs.
Silurian Period 408 - 438 Million Years Ago
Amphibians were the first vertebrates that came out of the water. The first vertebrates that could live outside of the water though were reptiles. or class reptilia this was during the Carboniferous period.
The period where whales first appeated is to be during the Eocene Epoch (56-34 Million Years Ago).