Question #450216

Science Q!!!!!!! Help me?

what animals lived in the Precambrian period? what animals lived in the Paleozoic period? what animals lived in the Mesozoic period? and what animals lived in the Cenozoic period? I have to write an big paper in science about animals in these time periods. so please help me! I appreciate it so much! xoxo

2013-03-06 14:31:48

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