Exam (elaborations)
HISTORY REPEATS ITSELF WITH COMPLETE SOLUTIONS
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HISTORY REPEATS ITSELF WITH COMPLETE SOLUTIONSHISTORY REPEATS ITSELF WITH COMPLETE SOLUTIONSHISTORY REPEATS ITSELF WITH COMPLETE SOLUTIONS
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HISTORY REPEATSITSELF WITH
COMPLETE
SOLUTIONS
Hadaen hEon h- hcorrect hanswer-During hthis heon, hthe holdest hrocks hand hour hmoon
hformed, hno hknown hlife hpresent hon hEarth
Archean hEon h- hcorrect hanswer-Eon hextending hfrom hthe htime hthat hlife horiginated,
habout h4.2 hbillion hyears hago, hto h2.5 hbillion hyears hago. hMicroscopic hlife hpresent hon
hEarth.
Proterozoic hEon h- hcorrect hanswer-The heon hfollowing hthe hArchean hand hpreceding hthe
hPhanerozoic. hit hextends hbetween h2500 hand h542 hmillion hyears hago. hFree hoxygen,
hmulti-cellular horganisms hbegin hto hemerge.
Phanerozoic hEon h- hcorrect hanswer-The hmost hrecent heon, han hinterval hof htime hfrom
h542 hMa hto hthe hpresent. hMacroscopic hlife hpresent hon hEarth.
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