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What is the time period era Cambrian where hard shelled fossils appeared?
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∙ 11y ago
Pre-cambrian
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∙ 11y ago
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What period contains the first fossils of land plants?
Cambrian period
What geologic period has fossils of the most primitive lifeforms?
cambrian
What two characteristics of early animals explain the scarcity of animal fossils older than the Cambrian Period?
The lorax ;)
Which type of organism appeared for the first time during the Cambrian period?
Trilobites
A variety of life-forms appeared in the Cambrian Period due to?
Warm, shallow seas coverign the continents.
What shelled creatures developed in the Cambrian Period leaving behind excellent fossils?
Trilobite
When did presumed animal fossils first appear?
The presumed animal fossils first appeared during the Archaean Cambrian period. There is no clear indication why they appeared this late into history.
What period contains the first fossils of land plants?
Cambrian period
What geologic period has fossils of the most primitive lifeforms?
cambrian
When did large numbers of fossils first appear in the geologic record?
Large numbers of fossils begin to appear around 530 million years ago. It is called the Cambrian Explosion, because it occurred in the Cambrian period. The Cambrian period was the first part of the Paleozoic era.
What organisms did the Cambrian explosion make?
First of all, the Cambrian Explosion is designated as a huge diversification event taking place between 543 to 506 MYA, when most of the phyla extant (living) today appeared. So the first chordates, shelled organisms and arthropods were seen in the Cambrian period. Therefore, complex bilateria dominated the Cambrian scene.
The first fossils of land plants and animals are found in rocks from the?
Cambrian Period Actually the correct answer to this question is the "Pennsylvanian Period".
What does the term Cambrian Explosion mean?
The sudden appearance of most of the major animal phyla within the fossils early in the Cambrian period. This caused a sudden diversification of life.
What two characteristics of early animals explain the scarcity of animal fossils older than the Cambrian Period?
The lorax ;)
During what period did the first vertebrates appear?
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.
Is where trilobites and brachiopods appeared?
Trilobites first appeared in the fossil record in the Atdabanian stage of the Early Cambrian period. The fist brachiopods likewise first appeared in the Early Cambrian era.
When did corals evolve?
Although corals first appeared in the Cambrian period, some 542 million years ago, fossils are extremely rare until the Ordovician period, 100 million years later, when rugose and tabulate corals became widespread.
