What caused the composition of Earth's early oceans to transition from dissolved carbon dioxide to dissolved oxygen? A.

Ultraviolet rays from the Sun converted dissolved carbon dioxide to oxygen.

B.

Excessive rainfall over ocean waters caused carbon dioxide to separate into carbon and oxygen.

C.

Cyanobacteria growing in ocean waters used up carbon dioxide and released oxygen.

D.

Lightning caused the dissolved carbon dioxide in the ocean to decay into oxygen.

Question

Biology

Laurel Dyer

10 July, 21:46

What caused the composition of Earth's early oceans to transition from dissolved carbon dioxide to dissolved oxygen? A.

Ultraviolet rays from the Sun converted dissolved carbon dioxide to oxygen.

B.

Excessive rainfall over ocean waters caused carbon dioxide to separate into carbon and oxygen.

C.

Cyanobacteria growing in ocean waters used up carbon dioxide and released oxygen.

D.

Lightning caused the dissolved carbon dioxide in the ocean to decay into oxygen.

+5

Answers (2)

Know the Answer?

Ally Gordon · Answer 1

C) It's the most certain answer as all animals are believed to have arise from aquatic unicellular bodies that multiplied and evolved into complex organisms. Like all forms of live they respired and took some millions of years to evolve into land animals thus consuming CO2 into O2.

Kristen Kim · Answer 2

Hello.

The answer is: A. Ultraviolet rays from the Sun converted dissolved carbon dioxide to oxygen.

the more carbon dioxide that people pumped into the atmosphere by burning fossil fuels, the more the oceans would absorb. The ocean would continue to soak up more and more carbon dioxide until global warming heated the ocean enough to slow down ocean circulation.

Have a nice day