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07 History of Life on Earth, Paleozoic characteristics Animals diversify into phyla present today, Mesozoic characteristics Modern-like sharks, Paleozoic includes Cambrian, Paleozoic characteristics The 1st plants appear on land, History of Life on Earth Era Precambrian, Paleozoic characteristics 1st insects, Precambrian characteristics 1st eukayotic cell, Mesozoic characteristics birds and insects, Cenozoic was 65.5 million to today, Mesozoic characteristics 1st flowering plants