2 years ago

¿A qué se debió el incremento en la cantidad de oxígeno en la atmósfera hace miles de millones de años?

1 answer:

3 0

Scientists think that algae first evolved approximately 2.7 billion years ago, and soon after this oxygen began to exist in the atmosphere. Photosynthesis by primitive plants and algae released oxygen, which gradually built up in the atmosphere.

Explanation:

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Ostrovityanka [42]

Answer:

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Explanation:

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lawyer [7]

<h3>Please select the word from the list that best fits the definition Sirve comida y bebidas.</h3>

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