Severe depression and bipolar disorder
C) when the length of day and the length of night are the same
Answer:
D, a gas produced durning photosynthesis (i think)
Explanation:
Just finished the final exam
The period during which the presence of stromatolites decline is the Proterzoic period. Stromatolites are widely distributed sedimentary structures consisting of laminated carbonate or silicate rocks, produced over geologic time by the trapping, binding, or the precipitating of sediment by groups of microorganisms, primarily cyanobacteria.
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