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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.
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∙ 13y ago
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∙ 12y agoAll the major phylums (phyla) of animals were present in the Cambrian era. Consult any reference on the Burgess Shale Fossils.
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∙ 14y agoThe earliest known chordate is Pikaia gracilens, which lived in the Cambrian Period. True vertebrates probably appeared in the Ordovician Period. Both periods are in the Palezoic Era.
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∙ 14y agoDuring the late Devonian period in the Paleozoic era about 397 million years ago
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∙ 12y agoThe first terrestrial vertebrates (tetrapods) had evolved by the middle of the Devonian period, about 385 million years ago.
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∙ 7y agoPaleozoic Era
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∙ 11y ago1864675434
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∙ 10y agodevonian
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Earth's first vertebrates appeared during this period?
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.
In what era did vertabrates appear?
Vertebrates first appeared during the Paleozoic era.
Did the first vertebrates evolve during the mesozoic 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.
What was the first warm blooded vertebrates that fed their young with milk appeared during the mesozoic period?
The mammals.
What was the first warm-blooded vertebrates that fed their young with milk appeared during the triassic period?
MAMMALS
When did the first multicellular organism appear?
Multicellular organisms first appeared during the Vendian period.
What period did human ancestors first appear?
Humans first appeared during the Quanternary Period which includes the Pleistocene and Holocene epochs.
What period did human ancestors first appear in?
Humans first appeared during the Quanternary Period which includes the Pleistocene and Holocene epochs.
During what period did the insects first appear?
Silurian Period 408 - 438 Million Years Ago
What period did whales first appear?
The period where whales first appeated is to be during the Eocene Epoch (56-34 Million Years Ago).
When did small furry animals appear?
The first mammals appeared during the Cretaceous Period.
What group of vertebrates begins life in water ans later lives on land?
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.
