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During Earth's history, what was the effect of photosynthetic bacteria removing Mass amounts of carbon dioxide from the atmosphere?
a. they decrease the amount of oxygen in the atmosphere
b. they triggered an ice age sea
c. they cause sea levels to rise
d. The increase the average temperature on Earth
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What do you need to use in order to work as an environmental scientist? you need to use the scientific method and__ in order to work as an environmental scientist.
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The largest unit within which gene flow can readily occur is a
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