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Author Question: The increase in atmospheric oxygen during the Proterozoic was most related to the ____. A)decrease ... (Read 43 times)

altibaby

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on: Jul 13, 2018
The increase in atmospheric oxygen during the Proterozoic was most related to the ____.
 A)decrease in global volcanism
 B)decrease in ocean sizes
 C)process of photosynthesis by bacteria
 D)appearance of land plants
 E)origin of complex life forms

Question 2

The ultimate source of groundwater is the oceans.
  Indicate whether the statement is true or false


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ky860224

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Reply #1 on: Jul 13, 2018
Answer to Question 1

C

Answer to Question 2

True


altibaby

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Reply 2 on: Jul 13, 2018
Gracias!

elyse44

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Reply 3 on: Yesterday
Excellent

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