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Unlike the atmosphere today, the atmosphere 3.5 billion years ago did not contain a. sunlight. c. gases. b. birds. d. oxygen. Please select the best answer from the choices provided A B C D

Respuesta :

20100218110276

Answer:

b. birds

Explanation:

cause i think, birds where not evolved during that period of time..

jaelynhiguera15

Answer:

The correct answer for this is actually O2 or Oxygen :)

Explanation:

I hope that answered your question in time

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