evolution

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dat_student

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Do we need to know the periods (e.g. plazoic, ordovician, silurian, permian, cambrian) and what oraganisms were developed in each period?
 
dat_student said:
Do we need to know the periods (e.g. plazoic, ordovician, silurian, permian, cambrian) and what oraganisms were developed in each period?
yes
 
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