14. When did cyanobacteria start producing pure oxygen? O A. After the Hadean eon
O B. During the Hadean eon
O C. After the Proterozoic eon
O D. During the Phanerozoic eon

Scientist believe that earths core is around 6000°c where does this heat come from

Create 3 equivalent fractions using the area model for 2/5create equivalent fractions using number lines for 1/2create equivalent fractions using multiplying for .3/4brainliest

What types of details should a draft of a research based essay contain? check all that apply-paraphrased information-information from questionable sources-facts that relate to the topic-quotations that illustrate ideas to convey-plagiarized information