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Marine life was present and the first to to develop. However, Trilobites were the dominant species during the Cambrian Period.
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Marine animals begin to develop jaws and armored exterior.
Echinoderms such as starfish and urchins enter during this period.
But invertebrates are mostly dominant. -
Earliest terrestrial Plants and Animals. In the Silurian Period, Eurypterids and Tikaalik are dominant after they are developed.
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Eventually the once dominant armored fish finally go extinct but different varieties of fish bein to take place in this period.
Amphibians and Ammonites are introduced. -
As for plants and nature, scale trees and seed ferns grow and spread in the environment along with swamps and coal forming forests.
Marine animals such as sharks and several more amphibians are still developing. -
Marine animals begin to go extinct.
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After marine animals go extinct, dinosaurs are introduced, Cycads and Conifers are abundant.
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Dinosaurs have become very abundant along with earliest birds and mammals including ammonites.
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Dramatic increase in flowering plants. Dinosaurs and brachiopods suddenly go extinct. As they become extinct, bony fish still remain abundant.
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Dinosaurs and any other prehistoric animals have gone extinct and placental mammals, modern mammals and mammals that are very developed runners have taken over.
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Much larger carnivores and predators are introduced. Neanderthals, Humans and Mastodons are the most dominant.
