Yes, in fact oxygen level in the pre-cambrian reach high enough levels to allow multi-cellular life.
The Cambrian period was part of the Paleozoic era. It occurred roughly 541 to 485 million years ago and is known for the rapid diversification of multicellular life forms, often referred to as the "Cambrian explosion."
The periods of the Paleozoic Era are named for the locations where the rock formations that represent these time periods were first studied and defined. Examples include the Cambrian period (named after Cambria, the Latin name for Wales) and the Devonian period (named after Devonshire, England).
The two basic divisions following the Precambrian on the geologic time scale are the Paleozoic Era and the Mesozoic Era. These eras are further divided into periods, such as the Cambrian, Devonian, and Permian in the Paleozoic Era, and the Triassic, Jurassic, and Cretaceous in the Mesozoic Era.
Trilobites are one of the index fossils commonly found in Cambrian rock layers. These ancient arthropods lived in the seas during the Cambrian period and are used by geologists as markers for dating rocks from that time period.
The permian period was the end of the paleozoic era.
The first period in the Paleozoic Era was the Cambrian.
The Cambrian Period was from about 543 to 490 million years ago. It is the earliest period in the Paleozoic ("old life") Era. Until relatively recently paleontologists thought this marked the beginning of life. Primitive life is now know from the Pre-Cambrian Eon.
The Ediacarian fauna are from the Cambrian Explosion. The Cambrian Explosion occurred in the Cambrian period. The Cambrian period was part of the Paleozoic era.
This refers to a period of time during the Paleozoic Era. Here are some sentences.The Cambrian Period was the first 65 million years of the Paleozoic Era.Trilobites flourished during the Cambrian.The Cambrian was characterized by warm seas and deserts on land.
The Paleozoic Era has seven Periods beginning with the Cambrian Period. The last period was the Permian Period which was from 290 Million to 248 million years ago.
The Cambrian period was part of the Paleozoic era. It occurred roughly 541 to 485 million years ago and is known for the rapid diversification of multicellular life forms, often referred to as the "Cambrian explosion."
Anomalocaris lived during the Cambrian period, which is part of the Paleozoic era. The Cambrian period occurred approximately 541 to 485 million years ago.
Starting with the oldest, they are the: Cambrian, Ordivician, Silurian, Devonian, Carboniferous, and Permian.
Yes. The Mississippian period is a part of the Paleozoic era, along with the Cambrian, Ordovician, Silurian, Devonian, Pennsylvanian, and Permian periods.
Trilobites were associated with the Paleozoic era, from the Cambrian to the Permian.
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.
The first part of the Paleozoic era is the Cambrian period, lasting from approximately 541 to 485 million years ago. It is known for the sudden appearance of diverse marine life forms in the fossil record, marking the beginning of the explosion of life known as the Cambrian explosion.