The organisms originally responsible for putting oxygen in Earth's atmosphere lived around
A) 3.5 million years ago.
B) 2.4 billion years ago.
C) 3.5 billion years ago.
D) 1.5 million years ago.
E) 6 billion years ago.
Correct Answer:
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Q16: Which is the correct series of events
Q17: Who disproved the "broth- to- microorganisms" hypothesis?
A)
Q18: Miller and Urey's experiments to simulate prebiotic
Q19: If you open a can of chicken
Q20: Some RNA molecules have been discovered that
Q22: The earliest photosynthetic organisms
A) probably did not
Q23: The earliest multicellular animals in the fossil
Q24: Exoskeletons provided an evolutionary advantage to organisms
Q25: Multicellularity enables organisms to overcome cellular limits
Q26: About 530 million years ago, what adaptation
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