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Why do we not have many fossil records from the Precambrian era?
Most life-forms were single celled, with no hard parts to fossilize.
What was the Precambrian era's climate?
The Precambrian is a long period and just as Earth has many climates now, it had many then.
Why hasn't cyanobacteria evolved much since the Precambrian Era?
There are many different types of cyanobacteria. We are just now beginning to discover how many exist in a drop of seawater. We have no idea how many existed in the Precambrian era.
Which example best describes life in the precambrian era?
During the late Precambrian, about 560 million years ago, the first confirmed macroscopic multicellular organisms appeared. Around 558 million years ago, the first mollusk, Kimberella,appeared in the fossil record.
What are the periods that make up the precambrian Era?
4,028,000,000 years.
Why do we not have many fossil records from Precambrian era?
Most life-forms were single celled, with no hard parts to fossilize.
Why do we not have many fossil records from the Precambrian era?
Most life-forms were single celled, with no hard parts to fossilize.
Why are more fossils found in the paleozoic era than in the precambrian era?
During the Precambrian times, life was mostly limited to single celled organisms. Life that was not single cellular didn't have any hard body part (like teeth, bones, shells, etc.) and so they weren't preserved.
What have scientist inferred from fossil stromatolites?
Stromatolites were much more abundant on the planet in Precambrian times which means that fossils found around stromatolites are typically from the Precambrian era.
Why do you not have many fossil records from the Precambrian era?
Most life-forms were single-celled, with no hard parts to fossilize.
Abundant fossil evidence did not appear in the geologic record until what geologic era?
Abundant and diverse fossils first appeared in the Cambrian era, although there is fossil evidence throughout much of the Precambrian.
What was the Precambrian era's climate?
The Precambrian is a long period and just as Earth has many climates now, it had many then.
What main characteristic distinguishes the fossil record of the Paleozoic Era from that of the Precambrian Era?
In the beginning of the Paleozoic Era, animals began to develop hard parts like shells and bones.
When did the ediacaran fauna exist?
The ediacaran fauna lived during Precambrian time and became extinct then, too. Nobody knows for sure why, but trilobites might have caused their disappearance.
Did the precambrian era occur first?
Yes. The first era was the precambrian era followed by the paleozoic era then the mesozoic era than the Cenozoic era.
Historians know least about era do?
**Precambrian**
When was the Founding Era?
the Precambrian era
