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Author Question: The abundance of oxygen and ozone in Earth's atmosphere can be explained only through biology. ... (Read 50 times)

EY67

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on: Jul 27, 2018
The abundance of oxygen and ozone in Earth's atmosphere can be explained only through biology.
 
  Indicate whether the statement is true or false

Question 2

Although it is difficult to tell from our vantage point inside the galaxy, astronomers suspect that the Milky Way is a barred spiral.
 
  Indicate whether the statement is true or false


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Chelseyj.hasty

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

TRUE

Answer to Question 2

TRUE


EY67

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Reply 2 on: Jul 27, 2018
Wow, this really help

rachel

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Reply 3 on: Yesterday
Gracias!

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