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Author Question: According to current science, why didn't oxygen begin to accumulate in the atmosphere for more than ... (Read 32 times)

corkyiscool3328

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on: Jul 27, 2018
According to current science, why didn't oxygen begin to accumulate in the atmosphere for more than a billion years after life appeared on the Earth?
 
  A) Early forms of animal life consumed the oxygen released by plants during the first billion years of life on Earth.
  B) Early life did not release oxygen, and oxygen releasing organisms didn't evolve for a billion years after the earliest life.
  C) Oxygen was removed from the atmosphere by dissolving in the ocean as quickly as it was released by life.
  D) Oxygen was removed from the atmosphere by chemical reactions with surface rocks as quickly as it was released by life.

Question 2

Although protons repel each other at a distance, they will actually bind if they come close enough together.
 
  Indicate whether the statement is true or false


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reversalruiz

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Reply #1 on: Jul 27, 2018
Answer to Question 1

D

Answer to Question 2

TRUE


corkyiscool3328

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Reply 2 on: Jul 27, 2018
:D TYSM

smrtceo

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Reply 3 on: Yesterday
Gracias!

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