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Biology, 21.06.2019 15:30
Which of the following will not cause mass extinction? a. drastic change is weather b. geological change c. both a and b d. none of the above
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Ecologist have observed a sharp increase of sulfur dioxide in the air . what might be a possible consequence of excessive sulfur dioxide in the air ? a. acid rain b. ozone layer depletion c.ozone layer hole d.increase in sea levels
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Biology, 22.06.2019 02:50
Factors that can increase mutation rates a. high temps b. low temps c. food additives d. uv rays
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Tiny structures inside of cells such as ribosomes or chloroplasts that have specialized roles are ca...
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