The start of the Paleozoic Era was marked by a huge diversification of life known as the Cambrian Explosion. Many genre of life emerged during the Cambrian Period. Although plants and animals were around in the Pre-Cambrian it was not until after the extinction event that immediately proceeded the Paleozoic that many advanced forms of life evolved such as multi-celled plants and advanced animals such as the arthropods.
Paleozoic
The permian period was the end of the paleozoic era.
The main characteristic that distinguishes the fossil record of the Paleozoic Era from the Precambrian Era is the appearance of diverse and complex multicellular organisms in the Paleozoic Era. In the Precambrian Era, the fossil record primarily consists of simpler single-celled organisms. Additionally, the Cambrian Explosion, which occurred at the beginning of the Paleozoic Era, marked a significant increase in the diversity of life forms.
That would be 251 million years ago. The end of the Paleozoic era marks the beginning of the Mesozoic. The last period of the Paleozoic era was the Permian, and the first period of the Mesozoic era was the Triassic; hence the extinction event (the biggest extinction event in the earth's history), the Permian-Triassic extinction, which defines the border between the eras.
Geologic time prior to the beginning of the Paleozoic era is commonly referred to as the Precambrian. This vast time span extends from the formation of the Earth around 4.6 billion years ago to the beginning of the Paleozoic era approximately 541 million years ago.
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 first period in the Paleozoic Era was the Cambrian.
The Permian-Triassic mass extinction event marks the division between the Paleozoic and Mesozoic eras. This mass extinction, which occurred around 252 million years ago, resulted in the loss of about 90% of marine species and 70% of terrestrial vertebrate species.
The Permian Extinction. Basically when many marine invertebrates died off. I am fcking 14 and I know this.
The Paleozoic Era
the mass extiction
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.