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Which is a difference between the Paleozoic and Mesozoic era?
Animals lived in the water during the Mesozoic and on land in the Paleozoic
The first birds emerged in the Paleozoic while mammals first emerged in the Mesozoic
Many different species of dinosaurs lived in the Mesozoic but they all died off in the Paleozoic
Animal complexity increases during the Paleozoic while the first flowering plants appeared in the mesozoic
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