The statement "Mammals were common during this period" is not accurate when referring to the Paleozoic or Mesozoic eras. Here’s a breakdown of the eras and their characteristics:
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Hadean Eon: This period is characterized by the Earth solidifying, with lava and volcanic activity prevalent. Mammals did not exist during this time.
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Paleozoic Era: This era saw the emergence of the first small shelled animals, but mammals did not evolve until the late part of this era, around the Permian period. The main vertebrates were fishes and amphibians, with reptiles emerging towards the end.
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Mesozoic Era: This is the age of the dinosaurs. While some early mammals did exist during this era, they were not common and were mostly small and nocturnal.
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Cenozoic Era: This is when mammals became more common and diversified following the extinction of the dinosaurs.
Based on this information, the statement is likely referring to the Cenozoic Era when mammals became common. If the context was about the Cenozoic, then the statement would be accurate.
Please clarify which era is being discussed for a more accurate assessment.
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