What evidence is there that oxygen levels in the sea increased due to photosynthetic bacteria?(1 point) Responses rust deposits in the ancient ocean rust deposits in the ancient ocean decreases in anaerobic organisms decreases in anaerobic organisms global cooling global cooling rust deposits in today’s ocean
The evidence that oxygen levels in the sea increased due to photosynthetic bacteria includes rust deposits in the ancient ocean and decreases in anaerobic organisms. These two pieces of evidence suggest that the presence of oxygen increased, as rust formation requires oxygen, and anaerobic organisms thrive in environments with minimal oxygen. Therefore, the increase in rust deposits and decrease in anaerobic organisms support the idea that photosynthetic bacteria contributed to higher oxygen levels in the sea.
The evidence that oxygen levels in the sea increased due to photosynthetic bacteria includes rust deposits in the ancient ocean and decreases in anaerobic organisms. Additionally, global cooling and rust deposits in today's ocean can also be indicative of increased oxygen levels.
To find evidence that oxygen levels in the sea increased due to photosynthetic bacteria, here's an approach you can take:
1. Research the role of photosynthetic bacteria: Learn about how photosynthetic bacteria contribute to the production of oxygen in the ocean. Photosynthetic bacteria, such as cyanobacteria, carry out photosynthesis and release oxygen as a byproduct.
2. Look for studies on ancient ocean sediments: Investigate scientific research that examines ancient ocean sediments. Rust deposits, also known as iron oxides, can provide valuable information about the oxygen levels in the past oceans. These deposits can indicate periods when oxygen levels were higher due to the presence of photosynthetic bacteria.
3. Analyze variations in anaerobic organisms: Consider studies that document changes in anaerobic organisms over time. Anaerobic organisms are living beings that can survive in environments with little to no oxygen. If the oxygen levels in the ocean increased, this would likely result in a decrease in anaerobic organisms. Look for evidence showing a correlation between higher oxygen levels and a decline in anaerobic organisms in the ancient sea.
4. Investigate the connection between global cooling and oxygen levels: Research into global cooling and its impact on oxygen levels in the ocean. Cooling periods can favor the growth of photosynthetic bacteria, leading to higher oxygen production. Explore studies that link global cooling events to increased oxygen levels and their effects on marine ecosystems.
5. Consider rust deposits in today's ocean: While rust deposits in today's ocean do not directly indicate the increase in oxygen levels in the past, they can still provide insights into ongoing oxygen production and fluctuations. Research how rust deposits are formed and their relationship to oxygenation processes in modern marine environments. This could help to support the idea that photosynthetic bacteria play a role in oxygen production.
By following this approach and referring to scientific sources and research studies, you can gather the evidence needed to substantiate the claim that oxygen levels in the sea increased due to photosynthetic bacteria.