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5.3. Takeover of the Vascular Plants

In the early Paleozoic, plants evolved to leave the water and invade the terrestrial landscape. Following this transition, vertebrates emerged into land-based ecosystems, and Carbon Dioxide concentrations increased in the atmosphere. The greenhouse warming of the Earth propelled the success of both prevascular and vascular plants, as well as the related terrestrial radiation of the three lineages of the reptiles. This week, you'll also learn about the Permian-Triassic mass extinction and later environmental changes that opened the door to the rise of the diapsids.

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