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The Cambrian Period
Part I of Essay
During a lot of things happened both geologically
and biologically. The Cambrian Period was the first period of the Paleozoic
Era, it lasted from 570 million years ago to 500 million years ago, 70 million
years. Itıs very important because it corresponds with the firs t .... Part II of Essay
.... and
the other seas of the primitive world, were Trilobites and Brachiopods .
Trilobites were three - lobed arthropods, unlike other arthropods Trilobites
had primitive ,unspecialized appendages. Brachiopods are simple bi- valve
shellfish that resemble clams. During the Cambrian corals and chrinoids
emerged. Chrinoids are sea animals of the class chrinoidea like the sea lily
and the feather star. The only plant life of the Cambrian period were
primitive algae.
....
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Words: 231 - Pages: 1
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