What evidence is there that oxygen levels in the sea increased due to photosynthetic bacteria?

a. global cooling

b. rust deposits in today’s ocean

c. rust deposits in the ancient ocean

d. decreases in anaerobic organisms

Answers

1. erosion
2. d and c
3. stromatolites
4. bites being blown off a rock by heavy winds
5. how old the earth is and how many eras
6. global cooling
7. bleaching effect
8. oxygen capturing electrons
9. dissolves rock into a solution
10. deeper and wider
11. few fossils

NOT SURE IF THESE ARE ALL RIGHT SORRY
1) ~ Answer is D ( Erosion). In earth science, erosion is the action of surface processes (such as water flow or wind) that removes soil, rock, or dissolved material from one location on the Earth's crust.

4) ~ Answer is A ( rock wearing down due to acid rain)

11) ~ Answer is C, there was no life during that period of time.

c

Explanation:

c

Explanation:

Rust deposits in the ancient ocean is the evidence that oxygen levels in the sea increased due to photosynthetic bacteria.

Explanation:

Sedimentary layers of iron oxides is one of the main evidence certifying that oxygen levels in the sea increased due to photosynthetic bacteria. Burial of organic matter was formed mostly 2,400 million years ago.

The iron layers in seawater were formed with in-depth production of oxygen by photosynthetic bacteria. When these microbes die, their remains become buried in seafloor. Their decomposition removes oxygen from seawater and the released oxygen combines with dissolved iron and forms insoluble iron oxides.

Hence, rust formations reflect the rapid increase in oxygen concentration in seawater, which was related with the active photosynthetic processes.

Rust deposits in the ancient ocean is the evidence that oxygen levels in the sea increased due to photosynthetic bacteria.

Explanation:

Sedimentary layers of iron oxides is one of the main evidence certifying that oxygen levels in the sea increased due to photosynthetic bacteria. Burial of organic matter was formed mostly 2,400 million years ago.

The iron layers in seawater were formed with in-depth production of oxygen by photosynthetic bacteria. When these microbes die, their remains become buried in seafloor. Their decomposition removes oxygen from seawater and the released oxygen combines with dissolved iron and forms insoluble iron oxides.

Hence, rust formations reflect the rapid increase in oxygen concentration in seawater, which was related with the active photosynthetic processes.



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