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22.07.2019 •
Biology
The absence of in the primitive atmosphere was essential to the origin of life on earth. n2 co2 ch4 o2
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Ответ:
→ The absence of ______ in the primitive atmosphere was essential to the origin of life on earth.
ans.
→ The absence of OXYGEN in the primitive atmosphere was essential to the origin of life on earth.
hope it helps!
Ответ:
Working on farms and plantations. Some even worked as house servants, they also cooked and cleaned.