Biology 3484A/B Lecture Notes - Ordovician, Silurian, Carboniferous
24 Dec 2012
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Document Summary
The origins of plants: proterozoic eon (2bya) first eukaryotic cells. Middle proterozoic (1bya) first multicellular plants green algae. The oceans were very important in the evolution of life on earth the first plants (green algae), animals, and probably fungi (don"t fossilize easily so hard to know) were marine. The paleozoic era, which consists of the cambrian, ordovician, silurian, devonian, Carboniferous, and permian periods, is part of the phanerozoic eon. Paleozoic era, and it consists of the triassic, jurassic, and cretaceous periods. Paleozoic ordovician period (began 480mya): the paleozoic era lasted 300 million years and lots of evolution and diversification occurred. The first part of the paleozoic era was the cambrian period, but this was not an important time for diversification of plants, only animals. During the ordovician period, the colonization of land by plants and animals occurred about 450mya. The first land plants mostly likely had symbioses with fungi.
