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How did photosynthetic bacteria changed Earth's atmosphere. A. Made it Warmer B. Made it rich in oxygen C. made it more dense
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Which are characteristics of flukes? check all that apply. a they are free living. b they are a type of flatworm. c they reproduce sexually. d they have eyespots. e they are segmented.
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How did photosynthetic bacteria changed Earth's atmosphere. A. Made it Warmer B. Made it rich in oxy...
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